Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6c1826c0b8b96b…

MALICIOUS

PDF

96.3 KB Created: 2021-06-26 14:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fccd08fd3f83e44268fa5576d2a009f9 SHA-1: 50d087c677ca70f9b1f336999ed5481d6f246bb8 SHA-256: 7d6c1826c0b8b96b16f151895a6585321decd5b922ba7a895b6f0f70db0ba4de
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/135d7e49f4dfbe7aa5108df732e90fd6/23279426543.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160768862bf725---lewufaselojujo.pdf
    • https://almuhja.net/ckfinder/userfiles/files/fuvanulenunod.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/ifi3l2dnief1rmvq2mb9iin3ai/gozunik.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/82f03a4fb9fea668c0da0ad948762495/verawe.pdf
    • https://boyanbolyarski.com/userfiles/file/33953393592.pdf
    • http://princeverma.in/uploads/files/40404460481.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ade883c7e94---pupipuronobobase.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9d0699b0---buvawipixopuvutonadi.pdf
    • http://studiopol.com/userfiles/files/silanenalukaxotiw.pdf
    • http://winfielddeli.com/ckfinder/userfiles/files/lozukudiguxumakavofore.pdf
    • https://dalnoboy.com/data/filestorage/upload/files/fofewivitokujid.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c37693cced8---wewiwujiv.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c588b5e08ca---53366165571.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8b50b9a6---60894591450.pdf
    • https://uniontend.com/userfiles/files/84079951784.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/d38r0a4mdfs7ghceldl5139bqk/94993733507.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/lonokowojakef.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a641c336f---zapoworo.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/af17ac1701770d7560e228664f94752e/97917802235.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d2c0a54e0---pudimutixebopopudijowa.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a203be606d9---11978689440.pdf
    • https://michelbarbot.com/upload/files/2045924760.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/vjvp11601tv166pg2ei1itfnhj/8602288840.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c75e153f8---zaxaruja.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/24764834363.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=preterm+labor+with+twins
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011577.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 16792 bytes
font_01_sfnt_off00012d8e.bin
e061c9f04c06120f3211a17171a80de5e2066b7fd3d7453f9f30e0b0abc35a6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8E 10600 bytes
font_02_sfnt_off000145a0.bin
602ac9deef0d94a6f8ad1f3d36df5af4a0ff61ff14d26ace98924c551651cb8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x145A0 17716 bytes