Malicious PDF — malware analysis report

Static analysis result for SHA-256 9205d61e553306ed…

MALICIOUS

PDF

83.7 KB Created: 2021-01-04 10:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 707d5fe3cc8f08c586519f29fbf85466 SHA-1: ebe41c2d26d758c2dbf9fef86b774df3c36cc3d7 SHA-256: 9205d61e553306edd0192829e3a368d8d04c4bce978ec00ddabba4fa7cf3ebdb
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 pointing to disposable domains, indicating a link farm or SEO manipulation scheme. ClamAV detected it as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=the+walking+drum+sparknotes PDF link annotation
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/f404a24fb7c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_5f8db35b0f3e3.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/winirobodenobo.pdfIn PDF document text
    • https://dinomorozowi.weebly.com/uploads/1/3/4/6/134610364/c7d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415531/normal_5fbd12c3deeb0.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/ruwizanemef_zoreserulili_satakovekamu.pdfIn PDF document text
    • https://cdn.sqhk.co/kipasewimoni/ejehcgf/basketball_free_throw_drills.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/7389749.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1b9d4114-d224-4cb7-85a0-3258cea9c4b5/72408531099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab34cfbc-1796-4e05-a868-8ec0a26f9f50/kaiser_flu_shot_2020_hawaii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f6c0d8-8aa2-4268-9697-baf2933609a2/64188714206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46bc505-0cc6-4470-aa71-51c57edda220/mmd_r18_gif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881ff313-119a-410c-b6b7-4fb0190055ca/william_westley_moore_jr.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD22 5360 bytes
SHA-256: 16add4d70113a23f4482d21072cae0bed6bc47747ca1181bbc7666b9403c2794
font_01_sfnt_off00010f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3A 11292 bytes
SHA-256: 6f61fa8cb5ae84e7d02942c9c021688f7e5946cd0fb467fe0cc5ccc982c4a55f
font_02_sfnt_off000133f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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