Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fa198659507be8…

MALICIOUS

PDF

91.0 KB Created: 2021-01-25 13:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d32f62b5b76c29aa98c5310727a2e962 SHA-1: 7631d857553eba930266a6ed7f0ec371eed1508b SHA-256: 93fa198659507be806916c831d88f1af88a7cc54134471675f12cab50263d439
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to suspicious or unknown domains, indicating a likely attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing or trojan delivery mechanism. The presence of external URIs and link farm heuristics further supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=indian+meme+templates+2018 PDF link annotation
    • https://cdn.sqhk.co/tokafumotebi/Ihjghgc/rikugokividelidutomuni.pdfIn PDF document text
    • https://cdn.sqhk.co/kisilusotuke/iekhdic/zusewalawowexeruvidi.pdfIn PDF document text
    • http://tk-pobeda.site/74995739877d6d07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379491/normal_5fe3acffdb2fb.pdfIn PDF document text
    • http://robinmani.site/diy_it_costumellyk3.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/mountain_climber_exercise_muscles_worked28x4h.pdfIn PDF document text
    • http://copyrighthelpptteam.com/20443643134alkrt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475564/normal_5ffe8470489c9.pdfIn PDF document text
    • http://rabota-plus.club/street_racing_car_traffic_speed_mod_apk_downloadpudzl.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/TySESKt/55412164355.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/bovenotojitowe/birthday_calendar_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/bombay_dyeing_plain_single_bed_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/30432646644.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_off000126c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C1 5468 bytes
SHA-256: 378389bce3df10a2c3a8b991cc957cb7252358cab5ad4e6bd56ae79cb648fa4b
font_01_sfnt_off00013944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13944 11516 bytes
SHA-256: 49da883f0b119fb4a77d93dc130244e1584407731b20f4e9dd3984c5619450e7

Open this report in the interactive analyzer, or submit your own file for analysis.