Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a969da3958ce1b…

MALICIOUS

PDF

106.6 KB Created: 2021-09-07 19:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 45d3790a67a431b234224e1e7e76760a SHA-1: d2ca2cbc44502016e0c8f96be129fc2ea4b29c52 SHA-256: 09a969da3958ce1bdddbdb36390a68e5b9b76bf7ad1da7acb178a8fd89907d44
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded links are consistent with attempts to lure users to malicious sites, likely as a first stage in a broader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=labor+law+uae+2019+pdf PDF link annotation
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd98ed9dafd---gasoxaxuramowofuwo.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/rizisexutoxaka.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/54457394421.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/34727529055.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/bizuvenivamixix.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ab710480126fe6ca7a3fe27fe7937cf6/66269693219.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f525de1e3ff---torazafokukug.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/6e6897291574b59ce6d51fd1f455745f/60715978906.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/451aa34baafc1f316299dc45bb57bad4/47502247721.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/84177021495.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/zezibe.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/pufuwiziv.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81e7f39d0f---69755906852.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/6281766325.pdfIn PDF document text
    • https://mahae.hu/files/files/belisefemokupalonarodixo.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0d9e953a6---komepatupojemuti.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/60765974446.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/432e56a0c4ad8fe3c00f0fbf883fdbe6/lekirunuguropoxavunovitej.pdfIn PDF document text
    • https://electroagro.es/pub/files/94546395507.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/ad4290cd92fcf45559b9015f69188dd2/4941247470.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/53721034287.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/08910307a4b43a74c002c6396fee44c4/dojulevabuw.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/5951baf7d67c95a7d8abc64591189b3b/kunupamigejorubud.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/8pt9j3f5onkjp99ldaf16kuuej/67934114261.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/dae19843c1d5eafda325891eb4c87a67/51496672493.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://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_off00013e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7D 17520 bytes
SHA-256: 8d24d97ce4b0fea8776d8a1b63dd43c8419b1c8ddef230c61b6384a47197b68e
font_01_sfnt_off00016c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001842f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1842F 10776 bytes
SHA-256: 1dac3bc3e5067ee899856dbf87266d21915b109b470cf1d8fa2fc12e5b6ad9c7

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