Malicious PDF — malware analysis report

Static analysis result for SHA-256 425822d2707a22c5…

MALICIOUS

PDF

80.5 KB Created: 2021-03-12 15:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 06d0e40175e20595e78bd4f2298ce51e SHA-1: e00ec96c1ae218dbbf1ee843d9aea4b20965dda6 SHA-256: 425822d2707a22c5152383a6697166369e96ccd2ac56dd8633632e8f31cb3baf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely leveraging T1566.001 for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/123?utm_term=arctic+white+king+starboard+plastic+sheets PDF link annotation
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/rapisor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499283/normal_600744a12c0bc.pdfIn PDF document text
    • http://gedozudusinap.mygamesonline.org/lifibebadabox.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/nordictrack_act_commercial_7_elliptical_cross_trainer_cardio_workout_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407784/normal_602f093d81868.pdfIn PDF document text
    • https://vifurenevu.weebly.com/uploads/1/3/4/8/134890767/94e3b5d6243.pdfIn PDF document text
    • https://wusatotaluvak.weebly.com/uploads/1/3/4/4/134469206/wibun-sasasa-fewogeja.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/roxuxogulifenize.pdfIn PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/2c214e7494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500877/normal_6033463e078fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_5fe9ca5f4a6dd.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/bogiselosaburajapano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_cf40ff05dc624f318f0532fbd85ef0f9.pdf?index=trueIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_8c8aaab4c7d5476aa1e1064607ad9ac7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/tatimotaxoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/19084201801.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/walametetojetiriduginu.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/80076247357.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/posefo.pdfIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_91b60077c2fb41f098cf2050836c0f57.pdf?index=trueIn PDF document text
    • http://situwosase.myartsonline.com/38494780791.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/tibolovunamapoteb.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_off0000f66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66E 5620 bytes
SHA-256: 79359e55662910bdb478f327ce9913b95d38fcdd4f67958df5aa6af0e3683427
font_01_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 12888 bytes
SHA-256: 455063b40efdc0d0795c1f401ccca33a38ae8477e363ebe9ae488f3a003dad3b