Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c1265072b273ea…

MALICIOUS

PDF

69.6 KB Created: 2021-02-11 16:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2a017e245ae5569bf1f4c1a0bd073bbd SHA-1: 2a70c6e6f23f883a3228bcaf24122f31bea175fe SHA-256: c9c1265072b273ea29d245f876be0c36d7e589972523e6337fe36f630cd67215
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The primary lure appears to be a 'letter soup game solver', directing users to the URL https://baarspo.ru/wix?keyword=letter+soup+game+solver.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://baarspo.ru/wix?keyword=letter+soup+game+solver PDF link annotation
    • http://arm-watch1.club/16767840187uerr9.pdfIn PDF document text
    • http://kutufirix.iblogger.org/chaalbaaz_movie_all_song_free.pdfIn PDF document text
    • https://burekanokem.weebly.com/uploads/1/3/1/0/131069897/wovazawewen.pdfIn PDF document text
    • https://sagolofuba.weebly.com/uploads/1/3/4/8/134873879/153381.pdfIn PDF document text
    • http://bnatural.space/mojave_bootable_isoekhzj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_6005b9fb79923.pdfIn PDF document text
    • http://fito4ka.xyz/cub_scouts_age_appropriate_guidelines90yh2.pdfIn PDF document text
    • https://bixikobitil.weebly.com/uploads/1/3/4/5/134525497/8e4a3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc809cd43bb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366308/normal_5fcc59f88e0a8.pdfIn PDF document text
    • http://claire-irk.ru/kennedy_center_millennium_stage_performance_schedulek24p7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suzibebozodumi.epizy.com/machamp_solo_raid_guide.pdfIn PDF document text
    • http://gusozafameximi.epizy.com/vijutiz.pdfIn PDF document text
    • http://natadomemorad.epizy.com/cdg_airport_information_flights.pdfIn PDF document text
    • http://lilexod.epizy.com/33982457197.pdfIn PDF document text
    • http://sitejaxikezo.epizy.com/8289236319.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C0 5140 bytes
SHA-256: e6d61a5483fb0eb7a61e25d1974ef46adf669cb58bfbdc4187065e8556d12f2c
font_01_sfnt_off0000e336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE336 11404 bytes
SHA-256: b4e845623bc52b7d513655545ba2b391359c21e193053dbbde40d7cf8e6b8479

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