Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f0d12aff6a1cf0…

MALICIOUS

PDF

176.9 KB Created: 2021-03-01 23:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 18ed19ce65d462b88847bc0c89574ff0 SHA-1: 2a10fb9e048ebb34cd0cebf6408ebe3f3d6c8922 SHA-256: 95f0d12aff6a1cf0298d7715bd181372e8458ba717a3321f076f82df20750679
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://seumenha.ru/award?keyword=special+theory+of+relativity+simple+meaning PDF link annotation
    • http://usmileofficial.site/dosifit2ptei.pdfIn PDF document text
    • http://pycnidwzxc.info/69749560648w6wcf.pdfIn PDF document text
    • http://thecet.xyz/hilinski_injury_reportioc37.pdfIn PDF document text
    • https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/xenoga-viganefudagogu-wugijimowa.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/R0Fheii/hopeless_3_dark_hollow_earth_apk.pdfIn PDF document text
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/wameju-gumegoxi-lagexowunipovet-befodixer.pdfIn PDF document text
    • http://elinekici.online/beep_song_tamilrockers52wd9.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/0jeapjt/bewokagutunekotasalakur.pdfIn PDF document text
    • http://ita-fitness.fun/31435128636qinem.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/fetomigevatas.pdfIn PDF document text
    • https://vorimebexefup.weebly.com/uploads/1/3/5/9/135960379/6370082.pdfIn PDF document text
    • http://gatorama.space/83487138973noctc.pdfIn PDF document text
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/534ab4.pdfIn PDF document text
    • https://nagaleburanab.weebly.com/uploads/1/3/4/3/134379557/7891912.pdfIn PDF document text
    • http://9gusevshop.space/52917385359ax23m.pdfIn PDF document text
    • https://tovumanaxi.weebly.com/uploads/1/3/5/3/135392352/wipuridobito.pdfIn PDF document text
    • http://cleanup-sale.site/98604914520dg0vp.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/gghfARi/25349719342.pdfIn PDF document text
    • http://ionatr.space/quranic_arabic_corpus23yu6.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/313e5bc9a3dccac.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/pugomoruxodujazakil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000250ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250FF 5696 bytes
SHA-256: f0deacd54a44757cdc1805054415b2bc41b4f434e717c1967466d1025c0d873c
font_01_sfnt_off0002644e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2644E 18668 bytes
SHA-256: 5263067f71aa879350a5bfee16518a0b66048b0b35c038f135efc7a35f8cf6f7
font_02_sfnt_off00029ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29EE4 16296 bytes
SHA-256: 944434688c19a328f24abdd2a86ddec7f1ecaf37e496ca09f05b7722ad8deeb0

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