Malicious PDF — malware analysis report

Static analysis result for SHA-256 2766113aa20fdd52…

MALICIOUS

PDF

75.0 KB Created: 2021-03-24 15:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ac18b0f019b0b51f3227575183da5c6c SHA-1: 78150b7fc2d6d70ce208bf869274b9de355c923d SHA-256: 2766113aa20fdd5266672f92bf288ddd7ddcfbba6256223da773135e91b4f3d9
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 poisoning tactic. The embedded URL `https://soxebez.ru/strik?utm_term=how+to+delete+lines+in+tables+in+google+docs` indicates a lure related to document manipulation, likely to redirect users to malicious content or phishing pages. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing/malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=how+to+delete+lines+in+tables+in+google+docs PDF link annotation
    • https://fijuzezakuxulow.weebly.com/uploads/1/3/5/3/135391315/3540967.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/cMjj8if/26055959355.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/6wbVjcW/71662821697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473064/normal_5fc8a51c5775a.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/6jiNnjh/86043792691.pdfIn PDF document text
    • http://suraneb.scienceontheweb.net/11190850099.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/42qiclt/nomorijezole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370303/normal_60002ec5d4ba2.pdfIn PDF document text
    • https://kexefofivib.weebly.com/uploads/1/3/5/3/135305266/gefuxaj.pdfIn PDF document text
    • https://cdn.sqhk.co/donaxewon/dBOijhg/2014_dodge_dart_sxt_rallye_0-_60.pdfIn PDF document text
    • https://lowunidedalovel.weebly.com/uploads/1/3/1/3/131380213/tupakiw.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/jozuga-tetebizafogi-mogumom.pdfIn PDF document text
    • https://kiwaluraxipexe.weebly.com/uploads/1/3/5/3/135326690/c9a8bbd73.pdfIn PDF document text
    • https://rafutukeri.weebly.com/uploads/1/3/1/4/131453201/1aa0f81a498.pdfIn PDF document text
    • https://komomagifagele.weebly.com/uploads/1/3/4/7/134705279/9dbe75b.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
    • http://vuxebezedigelun.onlinewebshop.net/megofinedukokomorowudi.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/bee_swarm_trap_diy.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/breast_cancer_treatment_guidelines_nccn.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/oxford_dictionary_of_collocations_free.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_off0000dd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2D 4992 bytes
SHA-256: c9ba550f45ef62f1dd7ec8b8872072cbbd55d6c38c0987c4934efff7685ecf53
font_01_sfnt_off0000ee47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 10004 bytes
SHA-256: 798320d29c0883894e415b6f29dc86728443c0572f536e81fd2709cb2de2536d
font_02_sfnt_off00011085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11085 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2