Malicious PDF — malware analysis report

Static analysis result for SHA-256 d702e44262e7936b…

MALICIOUS

PDF

75.4 KB Created: 2021-03-01 11:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9c462725a8214c6d59d26af2527bf5e3 SHA-1: 0e6b919bb3bbfca1a0a64147322a1113faec454c SHA-256: d702e44262e7936b66571aec2422a461bae2c522145547757e307c38e9066a1a
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, including one pointing to 'xezojetit.ru', which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/123?utm_term=can+i+mail+more+than+one+1096+in+the+same+envelope PDF link annotation
    • https://cdn.sqhk.co/jeporikate/eDiiigk/dizonamedikolefagudonogag.pdfIn PDF document text
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/virotutagofo_migifipiwidilu_rofurufuke_vudawurupir.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/mibiri_koliv.pdfIn PDF document text
    • https://tuzupenaxu.weebly.com/uploads/1/3/1/4/131454165/vowumurudixeb-gogiwokuk-fijazudisal-dakux.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/jjjn9Je/super_runners_shop_new_york_ny_united_states.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_603515c337c9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369917/normal_5fdeedcfd723a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_6023ff8575f8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460678/normal_5fdb52a11f20f.pdfIn PDF document text
    • https://kotemuzever.weebly.com/uploads/1/3/4/8/134884044/8402264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413693/normal_602d74f2963bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vugugevijoxudi.rf.gd/shielding_and_effective_nuclear_charge_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/kadisipiviwixeber.pdfIn PDF document text
    • http://mejizemobimoli.epizy.com/rokew.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/cancer_information_and_support_specialist_jobs.pdfIn PDF document text
    • http://gewapapis.epizy.com/95258832837.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_off0000ea94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 5528 bytes
SHA-256: 9cda3aa119fcf234c47e2cd1d1f283669b22c42a553765c41c8844809cd6fe28
font_01_sfnt_off0000fd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD30 10296 bytes
SHA-256: 131969dc71fb9a9233471f64a21fbd5bf02a5737f3903eed3f61c47ebe417ae0

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