Malicious PDF — malware analysis report

Static analysis result for SHA-256 85154b6712f1c8e8…

MALICIOUS

PDF

72.3 KB Created: 2021-05-07 12:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cc269cbc53dda99f2c0ef5c066132047 SHA-1: 2ba8d37cf6a482ac54bc5eccc7d02b17135b8d78 SHA-256: 85154b6712f1c8e84e3a88812528bb56036a8f669b563436ca15a6357e3e9fe5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://ponafet.ru/strik?utm_term=deck+of+fate+online PDF link annotation
    • https://cdn.sqhk.co/jutigurotow/gejc0kU/academic_performance_traduction.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_6039ad8c67bd7.pdfIn PDF document text
    • https://cdn.sqhk.co/xiponamoribo/jh5I6ig/jowin.pdfIn PDF document text
    • https://cdn.sqhk.co/xurawupo/jLOs67i/62370615597.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/fOvgejd/37967031605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_60132fd731c4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403262/normal_600278f2ccaa2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_70c01f666d5e4c93b702ca3eca4b2665.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/253a001a-8cd8-4ddf-a6de-7151115739ea/how_do_i_fix_a_gas_fireplace_pilot_light.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_2e03193815de49739d362a3bf2ece9b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/581d2892-534b-4112-8116-1af544ab82f3/nesuxisatod.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/pamusafu.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/zejozi.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_c3cf2ceb968d41f7a1917b9d856d8d16.pdf?index=trueIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_3c56a9d67aec42e38aad1af4ee1f1dc7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9097e6b0-958c-4f2c-9744-80cbdb1945d5/can_you_see_heartbeat_at_6_weeks_2_days_pregnant.pdfIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_bb03451d688141c086b7ea54def94a3a.pdf?index=trueIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_90aa87c33a5b4fa0a04eb1f4e2aec52f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/behold_hillsong_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/170f7059-ec3e-4ae2-8126-3025b6c0dba5/twilight_saga_part_2_full_movie_download_in_hindi_hd_720p.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_off0000dee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE5 4664 bytes
SHA-256: 913589667711d047bd4295addb28e858a9f66aabb1e77196c0e3e7be0962b1aa
font_01_sfnt_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 10964 bytes
SHA-256: 91528c62701bc5d5d184a3d6cb46a979a44467e4dc76be8d356abb1fd522d195