Malicious PDF — malware analysis report

Static analysis result for SHA-256 548503a0d4d080e5…

MALICIOUS

PDF

74.2 KB Created: 2021-04-03 15:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 89d66bd0e13a3282e682682a108d30a4 SHA-1: 5b4ce8245a051513fb06254e5d046294782ad346 SHA-256: 548503a0d4d080e50c1c24b7a6becf78ddb5878b45644869312342118b060b0d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The embedded URL 'https://ponafet.ru/aws?utm_term=stock+market+open+tomorrow+predictions' further supports the lure of financial information, likely as a pretext for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/aws?utm_term=stock+market+open+tomorrow+predictions PDF link annotation
    • https://nokifafib.weebly.com/uploads/1/3/4/5/134597692/dajuxarola.pdfIn PDF document text
    • http://goossyy.online/medical_terminology_a_living_language_freeg2si4.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/WAJrlii/outbreak_perfected_catalyst_solo.pdfIn PDF document text
    • http://fullstacket.online/sobapuicr5m.pdfIn PDF document text
    • http://santaparker.store/rovumabejumawzh5.pdfIn PDF document text
    • https://gamiwejejorar.weebly.com/uploads/1/3/4/4/134498461/vaxiluk.pdfIn PDF document text
    • https://babixedijifaz.weebly.com/uploads/1/3/5/3/135385025/cab778b9a4b.pdfIn PDF document text
    • http://allwoman.site/84318392044pr3x3.pdfIn PDF document text
    • https://rizitutidu.weebly.com/uploads/1/3/1/8/131856545/7600621.pdfIn PDF document text
    • https://pirebuvix.weebly.com/uploads/1/3/2/7/132710697/2f798d6d94b3bd9.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/ihQidia/vmware_horizon_client_failed_changing_expired_password.pdfIn PDF document text
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/pevax.pdfIn PDF document text
    • https://wopatozobaw.weebly.com/uploads/1/3/2/6/132682171/gekapokedeput.pdfIn PDF document text
    • https://besixovit.weebly.com/uploads/1/3/5/9/135997460/22982.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/gjiijgd/retract_battle_royale_android.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/ragejufa/kazofafuguvolovu.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/football_manager_2019_team_guide.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_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 5444 bytes
SHA-256: 01cce23295dda1a3cd647051841fff65b3a2105b1bd5809f30022b3badb051a9
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 11424 bytes
SHA-256: e19d4efda2e0fe45d7885819bc80bb325eab0fe95d83bed17ad8eada27afbe21

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