Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9b0bec3fcf3336…

MALICIOUS

PDF

70.1 KB Created: 2021-04-03 22:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58f3b7fc3030e472af48ba9c9896534c SHA-1: e8c18b47efe7ed01489dcbcb1a5f6857e7d5e833 SHA-256: fe9b0bec3fcf333641128ef65694b47630bd8d57ba02e24feeeb97532c4163eb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://lozipotod.ru/strik?utm_term=how+to+set+timer+on+hayward+aqua+plus PDF link annotation
    • https://dutimuju.weebly.com/uploads/1/3/4/3/134334277/8186643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_5fe7067270ebd.pdfIn PDF document text
    • https://cdn.sqhk.co/redodadix/aLdjbij/bumblebee_camaro_transformer.pdfIn PDF document text
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/4449045.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/qidorNK/yellow_lights_lyrics_hudson.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/wj2jejf/78848140606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471464/normal_6032e47254941.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464878/normal_5fcc8dfb719f1.pdfIn PDF document text
    • https://pufedoxavode.weebly.com/uploads/1/3/4/6/134613169/galufomenituluwojub.pdfIn PDF document text
    • https://fepepifufom.weebly.com/uploads/1/3/1/8/131872298/6571834.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5fefd648f3543.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda39610-7f69-4ebb-9bce-adf6bcbf2acb/17558673445.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/livestock_production_and_management.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/matlab_user_guide_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b3a55a-469a-406d-adce-55537b085b72/what_happens_to_my_soul_when_i_die.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/douglas_adams_hitchhikers_guide_to_the_galaxy_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8b5d90-2561-4cae-82a2-7173bae64af5/where_do_you_learn_wilderness_survival_skills.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_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 5480 bytes
SHA-256: 64dd1faf6dc72c683f3a291bac464bbb1acdf04f723771eaba8789aec7af7e86
font_01_sfnt_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 10648 bytes
SHA-256: edce78e2116b438ec991ada41fcb53825ab1e04c01924e8d53f0b9720eaf5c5c

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