Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1694b5f107c8d3…

MALICIOUS

PDF

114.2 KB Created: 2021-05-01 11:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef683c5a55eddcca04b10fe275adbe7a SHA-1: 79023ad741a1286feb60a21d5ce16570a3cec942 SHA-256: af1694b5f107c8d36b6512d109e2822fc2a5e0cf24913d1c4ae5d4193de806aa
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious files. The embedded URLs and the nature of the heuristics suggest an attempt to trick users into downloading malware, possibly disguised as a game mod.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

Heuristics 5

  • 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
  • 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://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074b41fe4892---73980371809.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16088d58257bb0---muzojujetadegowovixu.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/c7f13cda08f616f6ca6e02622a0fce67/zilesixanexavovetigujo.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5eb88b17f---14044259344.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee6c40c584---55749759017.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160895fb09a028---wasatefimogipamezuve.pdf
    • http://goteneplast.se/files/images/file/mobunifikabumuk.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/34fe5fc01d2d7c46d3c2a620997b5ab3/memijozarekirakowaj.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/742d1d6efbb69234c59af896494c30c0/77293021828.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6ceb42d1f11cd9b6c157b28f30b62e58/99775629402.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f27e3edffd---vekiwagojomevogagajekiwuv.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078940222a02---vokeseroli.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16072bcfbda7c3---pigeg.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160738e9d73add---6011750071.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/u3dqu4r8241v88112jf5i8kkuc/linenebogokija.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d311ff31635b953e4971632f19111966/58531779999.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e3c67ae67ac8cf477ef7fe84b5f78b29/37436900934.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cc8e93391---45404687714.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=tower+defense+infinite+war+mod+apk+revdl
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0001b893.bin
8795fd3f8a1c58ed033aa6af2ff35897532da05fa35d563e10863e8bf2b54a12		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B893 5530 bytes
font_00_sfnt_off00019b3e.bin
c6d4de3928385b775b9a1a9df4453b6ba597b0f9357bdac842a1bcf434b26550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19B3E 3136 bytes
font_01_sfnt_off0001a662.bin
fada0e91d3bc725ded676334ef28de18569c85519821de280e5d5868c483cdc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A662 5352 bytes

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