Malicious PDF — malware analysis report

Static analysis result for SHA-256 a946206642b76ff1…

MALICIOUS

PDF

78.4 KB Created: 2021-04-23 22:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a3b0d840586bab1126459823d2d8f9ef SHA-1: 6d84f3804eaa80c278e76b90831ca5d4254edf17 SHA-256: a946206642b76ff1f3cb3edb843044af51254acd94417ab6d47a336bb809da5b
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with many pointing to disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=data+analysis+example+project PDF link annotation
    • https://puwakama.weebly.com/uploads/1/3/4/4/134474688/fibinujatufusej.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/7accc8615bd47.pdfIn PDF document text
    • http://igclienteam.com/backbeat_fit_date_code_locationxfjt9.pdfIn PDF document text
    • http://xekowij.22web.org/acurite_14.5_timex_set_and_forget_wall_clock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_60156bfed285f.pdfIn PDF document text
    • https://tufutimijota.weebly.com/uploads/1/3/4/3/134350929/056f69787.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388413/normal_5feb493b02f74.pdfIn PDF document text
    • http://vinnipoh.fun/what_is_under_delegation_in_nursingzovxb.pdfIn PDF document text
    • https://rerofijujujedo.weebly.com/uploads/1/3/1/8/131872137/maxirarovaruwo-lurudigipe-mofurepa-vedawaw.pdfIn PDF document text
    • http://teren.fun/98941347921s7u3n.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/jefujodojiviz.pdfIn PDF document text
    • http://mebelintera.ru/86103791017tatlb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_604b728b9051e.pdfIn PDF document text
    • http://fbcopyright-center.com/akhiyan_da_surma_chan_ve_ringtonez132d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385028/normal_5ff9ebef52e69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevomum.epizy.com/digedapanowanewajunada.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/14385302146.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_406641aa5a7d44e2b753a9ffc0a08432.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_6357e6b5a7414a5080daf9d4ae5c3a0d.pdf?index=trueIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_079a6779678b443093cfe55a7be9bb3e.pdf?index=trueIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_37cff5afcc7e4be5923bd7118ea15f38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levovod/que_es_anemia_falciforme.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/butesenamulopom.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/street_billboard_mockup_free.pdfIn PDF document text
    • https://3c1ad7ec-bfc7-452d-a92a-0d22078d3251.filesusr.com/ugd/c6e823_202b43c741394dbd8012e5e72c5a3063.pdf?index=trueIn 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_off0000f388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF388 5324 bytes
SHA-256: 345ce91664ac5aed8458455976baffbd524b9b0bb0797ece8331eb0f5796a836
font_01_sfnt_off000105aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AA 11344 bytes
SHA-256: 14dbcdf4b80fff5b956d8e606ebac77e1aa222f495ef3b12e475f2779d90e0d9