Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee694c2611528bd0…

MALICIOUS

PDF

80.0 KB Created: 2021-02-13 10:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7d93b98e0dc99486398b26b0eecfb5eb SHA-1: 8d2db695d860b502486f9696ee3febd94df3c431 SHA-256: ee694c2611528bd0c690e5a47e928620c03823df195bcb02dfe0347491f47e8e
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains a large number of external links, many hosted on disposable domains, suggesting a phishing or SEO spam campaign. The ClamAV detection of 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/123?utm_term=christopher+mintz-plasse+wife PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fc81b13e4fc3.pdfIn PDF document text
    • https://walagewujiw.weebly.com/uploads/1/3/0/9/130968979/9692435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468828/normal_5fe296fd73393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5fda016c4bc78.pdfIn PDF document text
    • http://sanadewa.iblogger.org/the_heart_and_circulatory_system_worksheet.pdfIn PDF document text
    • https://mosugomepa.weebly.com/uploads/1/3/4/0/134096926/e8ac5c5.pdfIn PDF document text
    • https://xetiwokew.weebly.com/uploads/1/3/4/7/134741649/d84cc37e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444626/normal_5fe62de379079.pdfIn PDF document text
    • https://cdn.sqhk.co/foxidagon/V6sEEih/30636983638.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/bbULgfY/hacker_prank_simulator_download_pc.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/tujevugiwulujit.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/65cdfbb770db88.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/iUABVgg/88078041713.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/gisaperexewegumi.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/fesizisefeb.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofovam/hcdjmSl/redolemajewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/coordinating_conjunction_free_worksheets.pdfIn PDF document text
    • http://leduvusiluvev.rf.gd/telugu_new_love_emotional_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/goberezekifuzotupi.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_off0000fa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA39 5220 bytes
SHA-256: dec65896c34c52f0ebfbdd63f09115be2408e2512584e356d7cff2161b11e394
font_01_sfnt_off00010beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 11440 bytes
SHA-256: 48202eb9c0a21c87dbeb5cd973ead5b50a9d56031a86bf147b228fea73072542

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