Malicious PDF — malware analysis report

Static analysis result for SHA-256 68aedd6b029267dc…

MALICIOUS

PDF

77.5 KB Created: 2021-02-25 18:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fe2f2052a774bbd33b5a767da6b65ab5 SHA-1: 8ef7a4081566cba5e923604e4c80c73357a453b3 SHA-256: 68aedd6b029267dcaac55aa0260eba6ea87b236a8a294cc6ce56e2a7a4f86dbe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates tracking or campaign-related activity, further supporting a phishing or malicious redirection scheme.

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://baarspo.ru/strik?utm_term=miller+xp+130+mig+welder PDF link annotation
    • https://cdn.sqhk.co/rosomugimo/igISjcG/kumibubiminazivaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_600b4c9b89053.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/tijowo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421213/normal_5fe18d66ab15e.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/diary_of_a_wimpy_kid_rodrick_rules_book_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/g6xskja/police_light_sound_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/fvhijEb/durak_online_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/kejaxedusuk/cSgijcn/astuce_de_grand_mere_pour_soigner_le_rhume.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/19934708617.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409811/normal_60078a29a2631.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/28969580160.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471091/normal_5fc913d5c3d57.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/stihl_bg_86_spark_arrestor_screen.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/ziwuvijevo/sigajiwopipuwetuvisinapo.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/bujanujokeduti.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/dark_souls_3_save_file_download_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/why_my_mobile_hotspot_is_not_showing_in_my_laptop_windows_7.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_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 5412 bytes
SHA-256: 30ab0cb8e79757d32c3fe059f694082e9c5a334fd2e3d5b99665041fe9907194
font_01_sfnt_off000104c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 10732 bytes
SHA-256: 31110331e1942d70b81c81c043da15a18ab9826f1c4eea8316f13a6a70d752d1

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