Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf3079167eabd52…

MALICIOUS

PDF

76.3 KB Created: 2021-06-09 05:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afd8855c704f432fda5c0954461194bb SHA-1: 53785e809d7de0c528f6720cde2e6f85d4ba8a70 SHA-256: aaf3079167eabd52b8f40f072a98f502e3758dae00e9485ed1e86d487b11ca03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malicious content or redirect users to phishing pages. The document body's reference to "Windows 7 home iso download 32 bit" indicates a lure to attract users searching for software. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://irlanc.ru/uplcv?utm_term=windows+7+home+iso+download+32+bit
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf96dbddf33---rotoje.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9ee586f68---16246300747.pdf
    • http://absolutelyneon.com/userfiles/file/15589916635.pdf
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/73717160225.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/c007e5298522aab305108a53d9f4dfd1/vopusiwevelita.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783b1e3c599---webojemubugutibobigito.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/b32dcd500210fc0c524acd3f0b0ba2ea/17108370821.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/5atfll5mhsghtj902mmt4mmvf1/64652986761.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/4g9e8vjj4r7cjqq9auiei8v2l6/70025686413.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d04be76f40---jipazirasatezovexoparej.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/70uki0aguln8874d8ipmei00in/53851658594.pdf
    • https://bdsvieclam.com/upload/files/patulejowewilo.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5666c7c68---79162660149.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607af3eda42b7---mowalamovonaj.pdf
    • http://wisdomtours.net/upload/file/refijikiduleg.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af98eb2425e---22417164841.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1b3c59e291d0e34cdcbba3bccb5c058e/xebifozenifu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea26.bin
ea4abe4c5cd5771b66fd82f6f3818a4b85d1ec670f813b5ba300edc841ecc628		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA26 5588 bytes
font_01_sfnt_off0000fd1c.bin
95a00d29b1950179ece4729041a12fe15fd9f6782376b9fa3aedf51ec920acbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 11944 bytes

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