Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8498a045c9bb60a…

MALICIOUS

PDF

81.1 KB Created: 2021-03-08 08:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2dd424dcc057ecdce3cef20de2085f23 SHA-1: ad45ecb3c126cf190dd29637f3e70816c5846e04 SHA-256: c8498a045c9bb60a2aab9be9e0ac2e5c7c2ba7fa5489c83fad2053d6fc65d84f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of a URL with a 'utm_term' parameter suggest a phishing or scam attempt disguised as search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

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://jumiwimov.ru/strik?utm_term=when+was+icd-11+released PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458827/normal_6012fb4fd4336.pdfIn PDF document text
    • http://vinnipoh.fun/peloximumalodutoji0vuvl.pdfIn PDF document text
    • http://geekcods.com/bose_sounddock_series_2_manualqu7w1.pdfIn PDF document text
    • http://zumbayuliya.online/xuwibuxubiwofuxarul6mfrn.pdfIn PDF document text
    • http://xiredanu.22web.org/blender_2.8_the_beginners_guide_download.pdfIn PDF document text
    • http://vinnipoh.fun/zadanenupojogibofismbvlg.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/logitech_harmony_880_advanced_universal_remote_control_software.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446789/normal_600220791a2e4.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/ps_vita_low_price_in_india.pdfIn PDF document text
    • http://tatajosak.22web.org/wozuzesopesafamu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fce0d44678ba.pdfIn PDF document text
    • http://123dutch.com/vidurikikatasalepadofirj6kf.pdfIn PDF document text
    • http://hookup681.site/mens_fall_wear_20207trxj.pdfIn PDF document text
    • http://rollernefritmassage.xyz/dowaslmxcs.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/bean_bag_toss_length.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopikor.epizy.com/74424286751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8df2048-81ed-4f4f-affa-89c1b7623b2a/what_day_do_victorias_secret_employees_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1938f452-da7c-426f-981f-8f26e8de663f/79564770271.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_off00010016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10016 5216 bytes
SHA-256: cb892f658fdb09dca0cf40e7207f60a795fbd9e734d6fa03296a32f1d27f6c63
font_01_sfnt_off000111eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EB 11080 bytes
SHA-256: 30e1b0f6b05a72a6cd32fdaec12be9ce616e266aa96365b67f0070a74b187dc0

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