Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d8c8f9e8569f9d…

MALICIOUS

PDF

66.8 KB Created: 2021-06-27 06:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 41a71c4fda0bcc5bf7a000a430282b4d SHA-1: 043977653b6513127fff246ee6be837c4f51d2b4 SHA-256: a2d8c8f9e8569f9dd5f3e85f5f5f8377909d72faf4bd4239b84155091294c6a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a likely phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristic firings suggest the document's primary function is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4986

Heuristics 6

  • 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.
  • 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://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/972352936781ee4a062dac17897b440f/4574399624.pdf In PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ebaa8e464---84100806531.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/050bcdca039d610bf1692218baecc3e5/tosor.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/sokowuj.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2c585710f00a97b93d4db76f971c06de/94022837300.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/78076738327.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9ed22b337---33744304133.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1439778298---gufeki.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/i7rcu98mghutlf77ogov23evr3/kozubikeduvavefunuvaviwo.pdfIn PDF document text
    • http://healthywithhart.com/res/file/xemuxog.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/29665136058.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/65762725a9d684671ada6ed915f86be3/bijevaxo.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/eb9cb02cf3b35b6762dbdcc8d05ad353/juvexixub.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aa483d44c---bedesubupelinij.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/pupugebufuvu.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/84ftaf863dk1r6ehfn5k4dd408/91704375549.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ed2361391---tegigogabo.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/51846400571.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607303e7618a0---17909543272.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/divav.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/lpj9jujcoomhuusns68rpvrn4i/kexalowi.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ddc349644---43844120372.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/falizogogotalini.pdfIn PDF document text
    • http://griby.biz/ckfinder/userfiles/files/tefikijuxefanemexoviwev.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/7u0q2ct475kvtf0ohpmuf0f9fq/vurije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=is+number+2+recyclablePDF link annotation