Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cd970078f95f6d…

MALICIOUS

PDF

73.6 KB Created: 2021-01-08 15:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c90c014b357d19289659150b24bec5a2 SHA-1: dfb69eabc9e400a58cd70118dcd0236fc86bcddc SHA-256: d0cd970078f95f6d7c9c1e89041e52a5f3aadabc6666bca34f996396b433543b
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely a deceptive lure, such as a fake invoice or payment request. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm behavior strongly suggest the document's purpose is to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffset.ru/aws?utm_term=expense+account+template+excel PDF link annotation
    • https://gubojipupulep.weebly.com/uploads/1/3/4/3/134359502/2120566.pdfIn PDF document text
    • https://cdn.sqhk.co/wifurovud/eITibjj/84967933818.pdfIn PDF document text
    • https://fijitedutim.weebly.com/uploads/1/3/1/1/131164269/5403843.pdfIn PDF document text
    • https://setabuzi.weebly.com/uploads/1/3/0/7/130775645/kimuma-sozex.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/rudirexeraw_gixezo_kepeju_pozixusagopijav.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/EggmhgW/tic_tac_toe_strategy_pick_3.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/zosulakib-rividunebevopoj.pdfIn PDF document text
    • https://vabijerokajesi.weebly.com/uploads/1/3/4/5/134595953/4545369.pdfIn PDF document text
    • https://wejitefokok.weebly.com/uploads/1/3/1/1/131164199/wunife.pdfIn PDF document text
    • https://baxakazakibabim.weebly.com/uploads/1/3/4/5/134585713/1454402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5fa9985332e84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444646/normal_5fe544023c73d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca3aed2-5f36-494d-9191-efc7b2bdaba0/83203134723.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_off0000e462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE462 5008 bytes
SHA-256: c71aaa5d16f4beca572d05990e4bd223a03fa1f6c9e9ccccfd14bdd2b16548eb
font_01_sfnt_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 10576 bytes
SHA-256: ee1ea91f93b50c241da9e8d65ca525839dd1d3b375375ec523b8628c8281bc14

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