Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b341c8fd0cfe23d…

MALICIOUS

PDF

93.2 KB Created: 2021-02-14 19:10:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 25f8a28a098395d96b7b5eb14d1d9ee7 SHA-1: 8cbee96ee3bf92a0d710f63ae4d2e9082aa9aa09 SHA-256: 9b341c8fd0cfe23d81203c3d4c8e9321ed61cba8446be5a502acf7f057c68891
186 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains a significant number of external links, many hosted on disposable domains. This indicates a likely attempt to distribute malicious content or engage in SEO spamming. While no scripts were extracted, the presence of numerous external links suggests a potential for downloading further payloads or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=the+basic+practice+of+statistics+answers PDF link annotation
    • http://organic100.fun/ak_47_song_video_sunny_kahlonxdzvj.pdfIn PDF document text
    • https://cdn.sqhk.co/suwixowefa/hgGOPgh/pipaxizuxitaxatu.pdfIn PDF document text
    • http://instapresent.site/hp_government_holidays_2020a9mi2.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/ggcbXjj/star_wars_jedi_fallen_order_review_metacritic.pdfIn PDF document text
    • http://dorightunion.com/70626866642brcvy.pdfIn PDF document text
    • http://idealslim-ordina.site/xagegatekovipilalibitvz2l6.pdfIn PDF document text
    • http://coolvdomaion.online/33559437569hjpo2.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/ecEkuHg/2829644985.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/cifrge1/afterpulse_elite_army_apk_obb_download.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/iTB0ic2/juduvapifepisajitapozifix.pdfIn PDF document text
    • http://chaptejvxz.fun/27720587111gb0qg.pdfIn PDF document text
    • http://koteyarn.moscow/64073618511wou5i.pdfIn PDF document text
    • http://1xbets-reg.site/z390_aorus_master_hackintosh_guideydqec.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/hhuJFgc/67225825204.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/zudakeruronubivaj.pdfIn PDF document text
    • https://cdn.sqhk.co/nabixisaf/ij6VeRm/torofawiwubin.pdfIn PDF document text
    • https://cdn.sqhk.co/lewovazu/gi7ies5/41522272777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/naposekuvemodezunarexopaw.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/boomsday_puzzle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/50399990305.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/malwarebytes_anti-_malware_free_for_android.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_off000130d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D6 5252 bytes
SHA-256: 68a7b283462dcf92e20f70d3a5567d04ff8b0c24e43f2863a03389911951eb9e
font_01_sfnt_off000142bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BB 10716 bytes
SHA-256: c7e3c976cbda138e742aace106af6a47ee101b6968781f06c73acdf7f8f89dc6

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