Malicious PDF — malware analysis report

Static analysis result for SHA-256 80008cbf7eeab3c0…

MALICIOUS

PDF

81.0 KB Created: 2021-04-15 18:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d0a7614a965db1496ad18cf1b0737331 SHA-1: 2853aa827045e96a3bd3caeb2cddbeb96ab087d6 SHA-256: 80008cbf7eeab3c07bb054102f68b0ae9f1ffcecd911670829af74b33c0f33ea
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and extensive external linking are characteristic of phishing or malware distribution campaigns, often initiated via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/strik?utm_term=dyson+v6+absolute+cordless+vacuum+cleaner+troubleshooting PDF link annotation
    • https://temadugebunexi.weebly.com/uploads/1/3/1/8/131871621/df1f20310b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_603b32e183135.pdfIn PDF document text
    • https://rujikanonige.weebly.com/uploads/1/3/1/8/131872107/fugavesuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_600efe41545ee.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/65113347839.pdfIn PDF document text
    • http://reliables.ru/idle_monster_td_mod_apklg5yf.pdfIn PDF document text
    • http://mnogolidov.xyz/dbt_what_skills_mindfulnessh871v.pdfIn PDF document text
    • http://pycnidwzxc.info/toritipopuqu7jn.pdfIn PDF document text
    • http://golden-bridge.pro/tubbo_real_faceqypx6.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/16320676043.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/47065079752.pdfIn PDF document text
    • https://kovufevenisote.weebly.com/uploads/1/3/5/9/135981247/edd62411.pdfIn PDF document text
    • http://btsworld.org/46330546087l5e64.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/5132730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470019/normal_5fda8932cf802.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/14843738668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461481/normal_5fc8109ed19ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479436/normal_6060920962de4.pdfIn PDF document text
    • https://vuduxedife.weebly.com/uploads/1/3/5/3/135337585/c397262.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://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_1636cd07e2b24723a93a03d0d7d84c6e.pdf?index=trueIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_5b643a344d594e8c84082d4c801e9a26.pdf?index=trueIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_27297b8649d040a8b7086397109326d7.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_48d01884aff74e728d413f58e29a8b49.pdf?index=trueIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_cbe943cfd22341cfacf956161fe63191.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 5692 bytes
SHA-256: 6eb8b9c08b6e8bf5121a959dd042d5731e02ba9e2b8b5b21e5dccf8a297d92ad
font_01_sfnt_off000100ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 11636 bytes
SHA-256: 23ef3673bedecf325fde00079a2fa295e26ed6a95488f95c02aee5a7ff3e70d6
font_02_sfnt_off000127f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361