Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc700df9098e7e37…

MALICIOUS

PDF

75.4 KB Created: 2021-04-01 23:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 96b2695033dfab583ba62373ceed6614 SHA-1: 22f6282d5fb01bcc7d8f29e8f43e4cbbf051aa1d SHA-256: fc700df9098e7e37df969a09d7a127608bf220146dab407010432b59eeacbab7
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple embedded URLs, with one prominent URL leading to a suspicious domain ('resalured.ru') that is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to game information to entice clicks on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=dark+souls+remastered+4+kings+location PDF link annotation
    • http://roskycnmx.com/rixejiposifoxukeliwyqs3x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_603765961e8a8.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/jbIciif/love_and_respect_emerson_eggerichs_audiobook.pdfIn PDF document text
    • http://groshyk.site/mitsubishi_mr_slim_troubleshooting_not_coolingjcoi9.pdfIn PDF document text
    • https://cdn.sqhk.co/vabadoma/ijjh0id/nikad_nije_kasno_finale_2020.pdfIn PDF document text
    • http://dreabling.online/81158135873sx6l7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5ff6567fa6f6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482618/normal_5fc6409819790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459939/normal_5ff06b9873d7d.pdfIn PDF document text
    • http://on-arenas.com/38185499214sf08n.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/muwizexolapaburakugeweynor6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_e83052f0daad48c181f21a9b26f0fa5b.pdf?index=trueIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_92f8fb34de8d44b39897c0b83cfb0698.pdf?index=trueIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_c11de60ed5a4447d821f62c9792504a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/88695949272.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/factual_report_template.pdfIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_b5ef9c985100403fa4e2d658b2454052.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/kukasifufujawupomajudike.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA03 5412 bytes
SHA-256: 7fe0ef11dc7f786767f4144e360934b65f66d92b10aed99cea559e81b91f9d9e
font_01_sfnt_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 10604 bytes
SHA-256: ecba5acc1b6b90b39a0a4cfec6c595efe37875344d609092876ca2845147b7ba

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