Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92b7dc10eb0d14d…

MALICIOUS

PDF

79.0 KB Created: 2021-06-04 07:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 38414a0fa20958f47ec1d9a375ea33e9 SHA-1: 059d397422ec77532eaa13334390960fc387a299 SHA-256: a92b7dc10eb0d14d2c09473a93d8cc35c8b6ce999902a2905fbb2fb40380a7aa
186 Risk Score

Malware Insights

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

This PDF document 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 to redirect users to phishing or malware sites. The document body, though heavily obfuscated, contains keywords related to agreements and templates, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/123?utm_term=collaboration+agreement+template+australia PDF link annotation
    • https://lavozeto.weebly.com/uploads/1/3/0/7/130775819/guluzawadakali.pdfIn PDF document text
    • https://nugenezeni.weebly.com/uploads/1/3/4/6/134632238/lusebeguzajudedexoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_6058914a3d3d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_604bc9fb25456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_6058843b76c3b.pdfIn PDF document text
    • https://xumusozopojuvuj.weebly.com/uploads/1/3/1/3/131398507/38a78cd3d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404122/normal_60467979827b4.pdfIn PDF document text
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/acee1acf.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/fitaniretofix.pdfIn PDF document text
    • https://gesunujas.weebly.com/uploads/1/3/4/5/134509411/1a9074347.pdfIn PDF document text
    • https://rewiwuzaziba.weebly.com/uploads/1/3/5/9/135959403/fotisaxekawutijeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482424/normal_601a555897ae4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385636/normal_5fe2c438e729c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_601eff7e6b9b8.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/5f5b2e6a-6117-4701-8289-ffa8a031fb5e/nozafumapal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f7b7c3-deee-4271-8b9c-081af103f606/ps4_slim_wont_eject_disc_three_beeps.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144596115/35760736865.pdfIn PDF document text
    • http://vedufid.pbworks.com/f/duxiranedevamamuvazuvomiw.pdfIn PDF document text
    • http://sujagajo.pbworks.com/w/file/fetch/144595119/50133685837.pdfIn PDF document text
    • http://xumefosux.pbworks.com/w/file/fetch/144580131/96408596624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8008642b-5ed9-4d13-be8c-f4579f6f655d/viwobusita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93256fb7-5ad3-4f2a-8ba9-843ffd978cbb/how_friends_and_family_influence_you.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_off0000e844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE844 5184 bytes
SHA-256: ac65c1118e93b350cf6f72e4e67d951ebc4af8dee97ca9bf2f419ea2158239bd
font_01_sfnt_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 11280 bytes
SHA-256: 2387f9ae7bf5abc01ef66a10bf94f417d8a88dd5e5b586f9b46bbace04811844
font_02_sfnt_off00012028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12028 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f