Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf3d193035388d6…

MALICIOUS

PDF

162.1 KB Created: 2021-02-11 11:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 18a18489394b31d29e31c37542453ee0 SHA-1: de494783486d87bdf618fecae37d1279f0f90ea5 SHA-256: 6cf3d193035388d64ae02c776fcb23e2deeef99710264ad0f127401bcdd6adb5
186 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a brand-impersonation credential phishing lure, specifically impersonating Amazon. It utilizes multiple external URIs, including a redirector hosted on weebly.com, to lead the user to a malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

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://gepemizuwawufak.weebly.com/uploads/1/3/4/3/134335313/bepuzid.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://maypoin.ru/123?utm_term=charles+law+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475872/normal_602057f2d1953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_60147367aa0fc.pdfIn PDF document text
    • http://mivetys.xyz/flow_sheet_of_solvay_process5n96t.pdfIn PDF document text
    • https://gepemizuwawufak.weebly.com/uploads/1/3/4/3/134335313/bepuzid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fca7ad683f60.pdfIn PDF document text
    • http://sfr-webmail.com/gegomojubigotiminufeduwufzg6fn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_601d18ab3a896.pdfIn PDF document text
    • http://nutristrike-shop.ru/abbey_of_the_artsg4zx2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_6011c22e77aac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liwumulexajuvi.epizy.com/memitinikeverupox.pdfIn PDF document text
    • http://zurutoraxavifes.rf.gd/muzoratipunufir.pdfIn PDF document text
    • http://bizebiza.rf.gd/gusty_garden_piano_sheet_music.pdfIn PDF document text
    • http://xiwularofevomu.epizy.com/guruluki.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/fabidukumubunisoda.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/simple_partnership_agreement_template_free_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/nox_android_emulator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/xiwapirufuvifubi.pdfIn PDF document text
    • http://koxosam.rf.gd/sound_effects_for_imovie.pdfIn PDF document text
    • http://bisiziwaros.epizy.com/sekimetapewo.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_off0002427c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2427C 4836 bytes
SHA-256: 351768c21486972b8c899b0fadd5131d82faee2e968322b192df3bb06ad507fc
font_01_sfnt_off000252eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x252EB 11912 bytes
SHA-256: 23d700e377f882ecd84f95ce0c9eb10d93d6fd1c57e15b9c460b76ad66484214

Open this report in the interactive analyzer, or submit your own file for analysis.