Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fefb943cbbbabb…

MALICIOUS

PDF

654.2 KB Created: 2021-08-07 16:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7e316a735eca55718fda98bec1bef977 SHA-1: 310013166889171241d119153535296256d88c43 SHA-256: 94fefb943cbbbabbcde655fcb6c16c1bcec32dac0b5e1d06183be98e416a357c
306 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1553.005 Security Software Tampering T1219 Remote Services

This PDF document exhibits multiple high-risk heuristics indicative of a social engineering attack. It instructs the user to disable security software and install remote support tools, a common tactic for gaining unauthorized system access. The presence of numerous external URLs, including one pointing to a compromised WordPress upload, suggests it may also serve as a downloader for additional malicious content. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6433

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=minecraft+12.6+apk+download+v1.14.4.2+free PDF link annotation
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160886b3367404---xurefalef.pdfIn PDF document text
    • https://airbays.com/userfiles/file/89736244889.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/novil.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/530bb3e5c3b41055b3ce163e230cb3f2/74532179414.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/92464519501.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ec7aa6b4e---37359773736.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/68797097906.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/6c3e0cabfdbd838e388d24cb595940a0/mijasutolusamitajuzab.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160df0b03cd49e---40353009963.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/feriraweras.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/86310326832.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608adb680a9cf---37736352168.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/34514568734.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210606153839.pdfIn PDF document text
    • http://beateromer.com/bilder/file/betosuruwigusomazig.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/solalapulebo.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/161003dde26529---65296430670.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/249te8ndnqs8urd6pv2up6rndm/tadekopowutiruwipapin.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/nagosuredija.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/73b82d59a9c13d121b14f08631c08f6e/29665241838.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/10321655245.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/sejupojuwa.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/zavixinajejive.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/57077727974.pdfIn PDF document text
    • http://rsst77.ru/upload/files/18796606886.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00088377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88377 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00089b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B88 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off0008b0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0D0 11164 bytes
SHA-256: 5bbd7e7929d439b39677c87a8104cd765128f5be01dc8a6528f2ece68d28fb41
font_03_sfnt_off0008cb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB3A 115632 bytes
SHA-256: a4d1a930949ad14c4b20d7de95add6fbf759649df0f750594302dbadb5903061
font_04_sfnt_off0009ef58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF58 21344 bytes
SHA-256: 5eb73bea2e0978a461608b9bf5288d875520119cee0970e823d85428025b3a8e