Malicious PDF — malware analysis report

Static analysis result for SHA-256 e096b97f520605f1…

MALICIOUS

PDF

80.2 KB Created: 2021-03-23 16:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eb6c001bfa71009cd78efd297a642602 SHA-1: cdf02e15fc6aeb69bc22a9b97f553c469b7370fe SHA-256: e096b97f520605f141b46b5d3fb53b9391562a6838e3e04016e0a1c829e27766
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/award?keyword=agile+software+development+free+pdf PDF link annotation
    • http://sodaapp.club/la_biblia_hablada_hebreos_10xa2br.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_604ebf2e8bcbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_6035d132995a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454809/normal_603f678c0819f.pdfIn PDF document text
    • https://wazepitufakox.weebly.com/uploads/1/3/4/7/134735855/2991517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_60511f8fc1976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_6038fea25203d.pdfIn PDF document text
    • https://tizitumobupo.weebly.com/uploads/1/3/4/9/134904485/4016903.pdfIn PDF document text
    • https://niwuxepajo.weebly.com/uploads/1/3/4/6/134669398/jetavila.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469837/normal_6002d73f82f52.pdfIn PDF document text
    • https://vovazukaliwo.weebly.com/uploads/1/3/5/9/135962855/7ad9508.pdfIn PDF document text
    • https://fimiwopagib.weebly.com/uploads/1/3/5/3/135315251/wawuvovaxogodidekuwo.pdfIn PDF document text
    • https://xitokudid.weebly.com/uploads/1/3/4/6/134688137/tabukuma.pdfIn PDF document text
    • https://mumimobubaw.weebly.com/uploads/1/3/4/6/134640569/4b51f4ba259.pdfIn PDF document text
    • http://uniques.space/iva_retenido_por_fletes20wrd.pdfIn PDF document text
    • http://antonioit.fun/js_absolute_path_to_relativemudhe.pdfIn PDF document text
    • https://vitozosusa.weebly.com/uploads/1/3/4/7/134727909/607bf3e8b3.pdfIn PDF document text
    • http://topdiscount.pro/how_to_start_keto_diet_nzsemn4.pdfIn PDF document text
    • http://goldotzyv.ru/25020189434xoyq0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369936/normal_600842bc3fed9.pdfIn PDF document text
    • https://dunabosugetagek.weebly.com/uploads/1/3/4/6/134601841/3198a5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_7912bb33959d482bbdb8506919d92e83.pdf?index=trueIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_393adacbcc3743b4a8b743b79c4b8f9d.pdf?index=trueIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_cf2a22f3c7e64cf9881a56428811e9c2.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_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 5500 bytes
SHA-256: 198c57290be508c74f25e7ae6202fca04b088140bc0d689f20f7c10f82096171
font_01_sfnt_off00010a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A80 11424 bytes
SHA-256: 55d684ee962c88aed7c55647a1d42ebd5c6b55e26729448f75599aceac6751b4