Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95092b649fcb237…

MALICIOUS

PDF

82.5 KB Created: 2021-03-20 14:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 93ee1b170e32864e345aa21755c651b3 SHA-1: 6cfef8528cfa83d21b90216434bd7c195a5af16d SHA-256: a95092b649fcb237b6dfb4408cb8f0b1830635a9fac33f32133501f45f46bb26
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of 'utm_term' parameters in some URLs further supports the idea of a campaign to drive traffic to specific malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://ponafet.ru/strik?utm_term=ged+math+lessons+online+free PDF link annotation
    • http://lelonul.iblogger.org/jawad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_6053b31e314f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368949/normal_5fde754f98944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413361/normal_5ff37f6617a9c.pdfIn PDF document text
    • http://cmb-accueil.com/cisco_e1200_firmware53dud.pdfIn PDF document text
    • http://bajoxuj.22web.org/36964860045.pdfIn PDF document text
    • http://nubuweso.iblogger.org/rudiwutovidizuso.pdfIn PDF document text
    • http://pixubak.iblogger.org/poetry_comprehension_for_grade_7_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456420/normal_603a8a7703b09.pdfIn PDF document text
    • http://melifalafijuz.22web.org/beard_trimmer_attachments_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453900/normal_600eafcf88fdb.pdfIn PDF document text
    • http://in-step.shop/math_formula_for_bank_examskaktr.pdfIn PDF document text
    • http://detonic-italy.website/welcome_to_the_monkey_house_dandy_warhols_album_downloadgz7dj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://tuxiwifu.rf.gd/beginners_guide_to_wearing_makeup.pdfIn PDF document text
    • http://bupisutapapida.epizy.com/95298660563.pdfIn PDF document text
    • http://tawatibajat.rf.gd/makokesoposofipujemiz.pdfIn PDF document text
    • http://sozuwag.epizy.com/reinventing_your_life_by_jeffrey_young_and_janet_klosko.pdfIn PDF document text
    • http://fexenisidewa.rf.gd/55110151523.pdfIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_27dfda862fa54bc180ed5169496b432c.pdf?index=trueIn PDF document text
    • http://wubifut.rf.gd/vonopiwopimarewu.pdfIn PDF document text
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_217395f03a6643d5ae55e763829010ba.pdf?index=trueIn PDF document text
    • http://binalidagu.epizy.com/telirokirem.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 5180 bytes
SHA-256: da6a7d4d4d059dc90407d9fc3ee6b11c24aaa367a4c73d1ad733caec9452d5c0
font_01_sfnt_off00010578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10578 7644 bytes
SHA-256: a746592d09b83ce712801d9cf7e3ceab4a9eca04ece3c92679bb29d2547343ac
font_02_sfnt_off00011a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1F 10008 bytes
SHA-256: 730ef68bd2cd396acc8cc86049672740d709063edaaf0736aae6076a03b34802

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