Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b38662ac86d9295…

MALICIOUS

PDF

72.0 KB Created: 2021-05-07 04:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 02d5e2d5138b53833b9b2c391617e09c SHA-1: 32a4df80eff3898466b6d012b182377b78cf037e SHA-256: 6b38662ac86d9295f1092ab33f9acf7eaec255443e035b5bb75cd5f1a0aee894
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of brand-impersonation credential phishing, specifically impersonating Amazon. The document lures users with a fake refund or subscription issue, prompting them to call a number or click a link, which is a common callback phishing tactic. The embedded URLs point to redirectors and disposable hosting, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vobokalonumenu.weebly.com/uploads/1/3/4/6/134656332/9656458.pdf.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xajibur.ru/strik?utm_term=how+to+reset+lid+lock+on+maytag+washer PDF link annotation
    • https://vobokalonumenu.weebly.com/uploads/1/3/4/6/134656332/9656458.pdfIn PDF document text
    • https://vadurijale.weebly.com/uploads/1/3/4/5/134590900/loluj_pigobanepume.pdfIn PDF document text
    • http://auth02mobility.com/how_to_get_a_publisher_for_your_book_in_indiapjrbm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_603efe4187fac.pdfIn PDF document text
    • http://dezowem.medianewsonline.com/94536415882.pdfIn PDF document text
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/vopexato.pdfIn PDF document text
    • https://tagekoworiz.weebly.com/uploads/1/3/4/0/134016686/wedenufenazemozawoba.pdfIn PDF document text
    • http://websporizle3.com/jafixazodurudukemo90xx3.pdfIn PDF document text
    • https://fifejinokufo.weebly.com/uploads/1/3/4/8/134846395/49c23c58.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/technical_analysis_for_dummies_3rd_edition_download_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459180/normal_6012bb23500f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tobesonev.rf.gd/reading_plus_answers_drum_beats.pdfIn PDF document text
    • http://wokikeka.epizy.com/core_java_basics_notes.pdfIn PDF document text
    • http://lesolasate.epizy.com/43779873385.pdfIn PDF document text
    • http://besogigususatu.epizy.com/chiari_malformation_mri_protocol.pdfIn PDF document text
    • http://bonutosi.rf.gd/impossible_quiz_q_34_answer.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_off0000dc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 5572 bytes
SHA-256: 7a8075fb5f8d51ec04ec9c30f36db756a59c22780d58ffec79a3d52d0ed07e78
font_01_sfnt_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 10472 bytes
SHA-256: fb2c18fabe40bc6d57668bb5de543dd3b3a405aa110922a7c08a04cbb90c0b43

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