Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47ba13948fd8018…

MALICIOUS

PDF

448.9 KB Created: 2021-09-07 10:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4efbe9c35a798259ac3cb9bbb99d6c18 SHA-1: 9724e83d67ed9035bf53bc9a2354e459f6706f4a SHA-256: a47ba13948fd8018569e0798eae866caf652e5ec95a7f25f6ba553a2400f2269
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits multiple high-risk heuristics indicating malicious intent. It contains a link farm pointing to compromised WordPress upload storage and presents lures for downloading files and recovering secrets. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the document's structure and embedded URLs suggest it is designed to trick users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8493

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://iphonerepairservice.nl/app/webroot/files/userfiles/files/ribisup.pdf In PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/1920ef047733977564cb6b7c9f145d6e/34894949288.pdfIn PDF document text
    • http://gujaratbusinesspages.com/userfiles/file/lizotalepunu.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/jaturoxuzo.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/809d05d2535546e2aadf514028c2cfeb/kivaxat.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e497724184---gobufi.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/7aff7ffe9dd9721cfb16e585fc507c1c/digirifibo.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611694110c282---4672949012.pdfIn PDF document text
    • https://mmszke.hu/files/file/81728279642.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/difupezoxog.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/jozep.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/8dd0cc30fd61cad09d790c6f4152cc5f/75521037312.pdfIn PDF document text
    • http://446888.top/userfiles/file/tupizuziminip.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb31e9d3fe2---gisegubojiruvuwujorunof.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a299ae44e81---41727651336.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/notagolovimebi.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/78557041093.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90782994123.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f6fe14c620---82452490446.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/11569359693.pdfIn PDF document text
    • http://signauction.net/userfiles/file/nonire.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/16203450847.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d8bedcec8cb---javikadov.pdfIn PDF document text
    • http://hillcrestneighborhoods.com/userimages/74089175602.pdfIn PDF document text
    • https://rubfila.in/files/file/wolekakadib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=avaya+conference+phone+b179+manualPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00068a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A67 11056 bytes
SHA-256: 7ac213d0e78945b02a4e20c77a440742ff8c525eda88aa5d0241a2c972a837c5
font_01_sfnt_off0006a3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0006bbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBFA 21192 bytes
SHA-256: 945871b430fff3f62e3c6f6bc44d3dd0e99d59c058996efdf194c7f5a83a1c44