Malicious PDF — malware analysis report

Static analysis result for SHA-256 454eaf0bcfa9af5f…

MALICIOUS

PDF

70.6 KB Created: 2021-06-04 01:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06f609d62fad0cd1f646f83318c23c0e SHA-1: 71e5978e729e64c8316243481d9de3043b1f6e50 SHA-256: 454eaf0bcfa9af5fabd709bb3e866eddfc8772770118bedf68ad385c8884d580
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure. ClamAV detection and ML classification strongly indicate malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a tactic to obscure the true malicious destination by using a large number of links and disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8212

Heuristics 4

  • 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
  • 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://ketchas.ru/pbw?utm_term=is+the+acls+test+hard
    • https://cdn-cms.f-static.net/uploads/4477409/normal_606218f6d8374.pdf
    • https://godewofevi.weebly.com/uploads/1/3/2/8/132814364/nupezavit_podebabozefuzer_desixikaguji.pdf
    • https://static.s123-cdn-static-d.com/uploads/4384149/normal_60b1ff77eeab7.pdf
    • https://static.s123-cdn-static.com/uploads/4370051/normal_60087e8f58e7c.pdf
    • https://judurufag.weebly.com/uploads/1/3/4/6/134688768/9372bd9ef9.pdf
    • https://pajotesose.weebly.com/uploads/1/3/2/6/132681045/supipafige-serusapiga-tetuvoga-sofimugo.pdf
    • https://cdn-cms.f-static.net/uploads/4426085/normal_601e6e0f37dc0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6a13e3fa-c8e6-4de7-9c8b-e075ce10a81f/86868864337.pdf
    • http://zolunegoli.pbworks.com/w/file/fetch/144562710/clash_of_clans_tips_and_tricks_2021.pdf
    • https://uploads.strikinglycdn.com/files/29b55fb3-29ca-4407-9eb1-2bde917dd3aa/40483131764.pdf
    • https://uploads.strikinglycdn.com/files/ad6091a3-bc0c-439d-887d-48cb5b2a7698/fetepatewozukowurulir.pdf
    • http://wixugigir.pbworks.com/w/file/fetch/144578952/mortal_engines_book_3.pdf
    • http://xutosop.pbworks.com/w/file/fetch/144446580/tubidy_mp3_mzik_indirme_program_indir_cretsiz.pdf
    • https://uploads.strikinglycdn.com/files/c2c5cef2-b273-4bf5-bfaf-148128f4f883/simisujaxixakiloximovali.pdf
    • http://letonepamusi.pbworks.com/f/minevipepavidadenefevovil.pdf
    • http://sirazumebow.pbworks.com/f/dejevinazutinefetiladire.pdf
    • https://uploads.strikinglycdn.com/files/d265ee84-5d3b-40b6-a9dc-aee522728388/homeward_bound_3_a_river_runs_through_it_cast.pdf
    • https://uploads.strikinglycdn.com/files/bec077c5-0652-4c05-9f34-c0805d4cc2d2/fifth_grade_essays_examples.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f739.bin
5d0471ceeba7f19f1ecdf736a9cd8fa403485955a2751f52378271000bcfb5cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 4964 bytes