Malicious PDF — malware analysis report

Static analysis result for SHA-256 0346f093b9d13d1b…

MALICIOUS

PDF

74.2 KB Created: 2021-05-07 05:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 259cb99e27d2fa08d409abb1dbb68524 SHA-1: 780a27886695b04dfc245ed87749d587fd54ed38 SHA-256: 0346f093b9d13d1b31d25df6ac9bfe2688f2de6ba3f5cd74abca4054eefb811b
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. These links are designed to act as a link farm, likely to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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 http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a5e623a90---89416957058.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/21t261hqiu0jamfcmv6qqg1ki8/tebagapukejiwute.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/b133fbd29d9a90db2c250e803ffd53bc/62539935212.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/9d93d832eda48448e49f99c39cc85586/32379792225.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5d6f01037---23542297799.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081888503b97---diloxefoj.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608e499ab2bac---lakevapimovemeli.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f994638e5a---80714810856.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607140f3d168c---37711627025.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088714f49281---23113765792.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/2e3d94aa5baddd1cbeccd3d716b6fa80/popufijogixazi.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607474054d817---xofokenalijiniloluzora.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/9c432c5e28cf7b8298abea1bec8004f0/93591321874.pdf
    • https://aawyx.com/sites/default/imageuser/file/divizukuxezit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=python+format+datetime+day+month+year
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86f.bin
05c2eff60414def768396b745bf35f37c97ed024bbb1769fd7c4d49712c6f12f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD86F 4828 bytes
font_01_sfnt_off0000e89b.bin
5ce114bcb9168c719e54a8fd1d6848ed3d8541b908b476baa5eb72772b8e037b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 10760 bytes
font_02_sfnt_off00010d80.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D80 4324 bytes

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