Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2e11a60e245789…

MALICIOUS

PDF

41.4 KB Created: 2021-06-09 20:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 021b8bf13f34735a83a56c6931587cb6 SHA-1: 72a6c5b7b65719805bdcad724688d17dae0b5840 SHA-256: 6e2e11a60e245789ad41a2114dd1d40d7911739ac2003853e32f940426d1b72f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains a single image and a clickable link, typical of a screenshot designed to trick users into interacting with a malicious URL. The document body itself is heavily obfuscated and contains metadata related to its creation, but no direct instructions or content beyond that. The presence of multiple links to compromised WordPress sites and disposable hosting suggests a campaign distributing malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8311

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 41 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pistant.ru/uplcv?utm_term=borgnakke%2527s+fundamentals+of+thermodynamics+si+version+global+edition+pdf PDF link annotation
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a0ca1398ea6703152fe07d676b333296/zafuwolelekunapot.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/telinozefonife.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60b7eb0c0a---fezevufi.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3120a8d7f---46282898132.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087a2e369297---71378317523.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/428c3e0eb5492c0e6f54a99e051bd7d0/zewurunibuwu.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/97099809273.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890bf7728e7---56442069905.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/ee8a9f2d4c44c5086cb414b32a36792d/joramepujabirune.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d08136f9e---47100764519.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/86019393776.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/dupitezaf.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7c4f64098---lewuroxinifekilasabiwanix.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/b5f3c8f610c8a1248ff4963deb7be29c/jubijigiko.pdfIn PDF document text

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