Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cad02ae4019bd3c…

MALICIOUS

PDF

92.2 KB Created: 2021-06-30 02:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10aa25bac1a8f35cbcb9c7e0aa2b7105 SHA-1: e92f383f078ea3eba3edf71e84dd786d7d9eff64 SHA-256: 1cad02ae4019bd3c0f524749038d05aff57bf619ec5d94db1bcb49bbfc8ff34f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute traffic to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL analysis point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d9e3d689cdf9898cd9bee0f2cd4c5ff/93227330732.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/48883d0d47069e81d4d36244005a8904/jitifega.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74422cdb25---razidajuvimelixowit.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081e50e6950e---lizuwolaporal.pdf
    • http://hongshengfish.com/uploadfiles/2021051617425669888.pdf
    • https://assignmentmart.com/ckfinder/userfiles/files/josega.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/02303d575aca9f7965ce75c3d4929a46/94112983050.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9324623db1c96722f8671085475a3eff/wopewugavenux.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/4b023dc7bf1f316ebbf7fa0da33ab2cd/45175858625.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/5ca6f91202d3187f46801fc29d51def1/20256748508.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac64f4e1e74---5014438686.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/494b5c6d161ae59e249db9e963f38422/29477812849.pdf
    • https://bushregenerators.biz/userfiles/files/fijutedufijirebe.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a37e6d8a45---86901678588.pdf
    • https://intrigantka.ru/images/userfiles/file/41016169238.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/lm8cteobqg2c6su6rf37kfouk2/vusejinefesa.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071b697d88cf---fidutibusaser.pdf
    • http://scales-center.com/shop/fck_file/file/96338987132.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/4b204130cea2fb4e37eb3836b8cd428c/pamoboritejef.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b9b37ae4---13920412011.pdf
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/u84u3engt85vsq259si1svr2i0/22208716251.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b028bb1a15---wabedeponugezovesidilamaj.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907a442cf9f---mogemukijunep.pdf
    • http://kotolantopeni.cz/file/pubawebovaberetopisus.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bayesian+learning+for+neural+networks+pdf
    • 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_off0001038d.bin
644ced541c296c42ff6f532be3c260eeb5973d029dd91baa86342e6ab1c5087a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 11120 bytes
font_01_sfnt_off00011d8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 16792 bytes
font_02_sfnt_off000135a0.bin
a6f5919bf9862590fa9e96b5eddf270d2aab05254c3ae7c3516345f385601d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135A0 17436 bytes

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