Malicious PDF — malware analysis report

Static analysis result for SHA-256 9827dea8459226af…

MALICIOUS

PDF

72.5 KB Created: 2020-11-11 18:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cac2af543fee1b0f316077135b69fd0 SHA-1: 794386360e46dec4f6d6a958c6d29004dbbe5a2d SHA-256: 9827dea8459226afdbeb5763315347b46fcf946857edcd25dbd664155295bd1f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for SEO poisoning or redirecting users to malicious sites. The document body, though heavily obfuscated, contains references to 'Parasite Eve official strategy guide pdf', likely a lure to entice users to click on the embedded links.

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.
  • 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 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://traffking.ru/123?utm_term=parasite+eve+official+strategy+guide+pdf
    • https://kopupoko.weebly.com/uploads/1/3/4/4/134471128/bfeb0414.pdf
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/eea92587.pdf
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/fazerufuxuxixa.pdf
    • https://cdn-cms.f-static.net/uploads/4416938/normal_5f9f705ce2ba6.pdf
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/dd0374.pdf
    • https://tuvomirunasoz.weebly.com/uploads/1/3/4/3/134324776/6012372.pdf
    • https://sevebara.weebly.com/uploads/1/3/4/5/134501605/pexap-wosewu-vadoz.pdf
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5f91ca418b945.pdf
    • https://folobuwula.weebly.com/uploads/1/3/4/3/134374444/guxubixuderumej_gozojanabutog_sunesudopakugo_sosafogeweg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0c5cf25b-9e0e-41b8-945d-ea81ea9e82b5/buziwugivikewubixesa.pdf
    • https://s3.amazonaws.com/xanebavifamopez/8270284718.pdf
    • https://s3.amazonaws.com/tapexiw/play_home_illusion_english_mod.pdf
    • https://s3.amazonaws.com/punagilelabon/linear_algebra_a_modern_introduction_3rd_edition_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d18c.bin
39a723d5919a28fb060b7e1496d06210756c47b4d3ebebefdd516f487008f1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD18C 5484 bytes
font_01_sfnt_off0000e457.bin
d58772284af1a61750b843b723e0352dfedbbbdaea659afda2b36c32d905eb1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 15808 bytes

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