Malicious PDF — malware analysis report

Static analysis result for SHA-256 664e5c2ad7557001…

MALICIOUS

PDF

77.1 KB Created: 2021-02-15 19:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 58873c5cc8c07683a4e9d2a135e5388c SHA-1: 5ea31debfc3513eec926bf81ad4c5933a97e1b32 SHA-256: 664e5c2ad7557001c2b4831e6aa9b360ff589220759e00875a94ebf09c619093
186 Risk Score

Malware Insights

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

This PDF document is identified as a credential phishing lure impersonating Amazon. It contains numerous embedded URLs, many of which point to disposable hosting services or redirectors, designed to lead the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to steal user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/moluvan.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.
  • 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://druttle.ru/strik?utm_term=2004+pt+cruiser+transmission+replacement PDF link annotation
    • https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/moluvan.pdfIn PDF document text
    • https://nasotatuji.weebly.com/uploads/1/3/4/3/134392375/xuzapowef-kumug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413966/normal_60089ac0cffc1.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/baduvaja_zujimi.pdfIn PDF document text
    • https://luwojasog.weebly.com/uploads/1/3/1/3/131380471/7219010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412896/normal_5fce2804b6fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451221/normal_5fd8dcf6c1a50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fca24d6ee89d.pdfIn PDF document text
    • http://de-bewertung-889562.icu/sosyal_bilimlerde_aratrma_yntemleri_af_ckm_sorularoyru3.pdfIn PDF document text
    • http://tacfitproducts.com/phonetic_alphabet_font_freedcxpq.pdfIn PDF document text
    • https://cdn.sqhk.co/ruduligived/khjjghi/94785195959.pdfIn PDF document text
    • http://shoop-fl.ru/cheque_em_branco_filme_completo_dubladol4ukm.pdfIn PDF document text
    • http://bnatural.space/incentive_and_bonus_policy_templatef2ai7.pdfIn PDF document text
    • http://kino-vezde.ru/never_gone_mod_apk_android1m9wp.pdfIn PDF document text
    • http://copyrights-notices-helps.com/maths_questions_for_class_4pa66e.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 5344 bytes
SHA-256: 6a971475030a01d9e73042afb993563ab03249d4c48034ef9d10bfbf70b98c42
font_01_sfnt_off0000ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 11664 bytes
SHA-256: c9fba25a1e4f0f40c52b8168aa768220ce012e94597c97101287cabc4dcefc5a

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