Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee391df0ed83f25…

MALICIOUS

PDF

68.5 KB Created: 2021-09-30 14:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: eeb51ad90fcda1aac634af9dfafd9166 SHA-1: 567e6c15bcc829e8d2d619f168bafc67897825c4 SHA-256: eee391df0ed83f2588a1a1942997ac9290cba739586940236f0586faf22a1011
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. The 'Image-only document with action trigger' heuristic indicates a common tactic where a screenshot is used to hide a clickable link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://drafthe.ru/uplcv?utm_term=gta+5+download+for+android+free PDF link annotation
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/janagu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381eb7d114f---95620060547.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/marinijovedito.pdfIn PDF document text
    • https://emenu.hu/editor_up/15204318224.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/nasanufiwori.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161394de736f42---beniwesaxise.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/pukidagunonazix.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/sitemefuxup.pdfIn PDF document text
    • http://fajni3333.fun4two.pl/uploads/assets/file/wovonaxerusotefused.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/50296522973.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/68652857908.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16135d8f07d8ac---simedikeb.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/lewanimawozulefusoz.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16131ab26b174e---goloxufolu.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613732d233786---sutavinawo.pdfIn PDF document text
    • http://eternoohydro.com/d/files/pidufesavep.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/zafivazajunugugopaniji.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/29026278503.pdfIn PDF document text
    • http://tochalco.com/uploads/files/jusat.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/35248670223.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161401f3278b30---senafudobon.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/ptegi3lbjq0dn3fldmukl5u99v/luxozululusabaledin.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/gokonimurinobisi.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://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_off0000b1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA14 10436 bytes
SHA-256: fe57d6a7f916666082671ef8f3b70ca6ea1e1173fdce2c67f8f6bb227f9ca51d
font_02_sfnt_off0000e1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 14464 bytes
SHA-256: d3b08237e52d1fde1c8c857c53da1f8e84cf65cb9439b0100da1b30bb9021681