Malicious PDF — malware analysis report

Static analysis result for SHA-256 005e5b36c290b4da…

MALICIOUS

PDF

89.9 KB Created: 2021-07-22 00:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0640953bae374b1c11a224546c526b11 SHA-1: 6711bdfceca539240e7385289550a76d76739a22 SHA-256: 005e5b36c290b4daac6096542f17ef8bf2ef5574453ec8dbf2d2a6461a53f106
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues about its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/4hd4gh6osqk58v28e1r5id5dda/lisumolovidipu.pdf In PDF document text
    • http://gwhs79.com/clients/867100/File/xokagorimemevokazudilexu.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/28744b6a3fd7de24e7f4ceeb4c88059f/89271502416.pdfIn PDF document text
    • http://cedarvalekansas.com/clients/875954/File/51682351750.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/tusavakov.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/51715436090.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/68o9g4qsmq5hs1upj3oe440rtv/petamogusus.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/99251384819.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/f9afe5146d81ca4cac3335ea61777c5e/wawivumafupu.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f6b07be65---86626339227.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/44883148058.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d7059e5fe4d---16711448973.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/sizigivuzo.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/1ac8a8da4fa85561f847548f5c809feb/46279405000.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/melivakokubewux.pdfIn PDF document text
    • http://armanetti.com/images/3386937782.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/18980859312.pdfIn PDF document text
    • http://goldmustang.ru/files/files/86649850475.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/13213730011.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/15df433e0e9f15744da043fa8393a7d7/29260948804.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab40e15b851---jimuzogubebekajotubor.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/23772868244.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=good+morning+text+for+bestiePDF link annotation
    • 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_off0000fbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE9 16536 bytes
SHA-256: e7bb7620632425cd8881f3989782bc5c131b53b744719af52db180d2f77bed30
font_01_sfnt_off00012678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12678 10772 bytes
SHA-256: fe41050203edb0972b7f02d06fa5fd77f4fba98e5de625eba752494b55aa0930
font_02_sfnt_off00013f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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