Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e4564e20c42a6e…

MALICIOUS

PDF

91.2 KB Created: 2021-04-12 08:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b365214dbaaab1e0b113d57a75a73344 SHA-1: 166a1fe28269f5eef028f2e3d2a4e6d4943fd6e6 SHA-256: e0e4564e20c42a6e2d5dce61af9904fdb456d7c8c3b6f217838abae34fd88f8a
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://nipisod.ru/strik?utm_term=how+to+cite+a+website+apa+with+no+author PDF link annotation
    • http://vexasefagi.scienceontheweb.net/decorative_birdhouse_plans.pdfIn PDF document text
    • http://xenakasewexibal.sportsontheweb.net/anglo_saxon_literature_characteristics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392656/normal_5fe09961cda5b.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_60497a59a674d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5fede0cd6d2d0.pdfIn PDF document text
    • https://gososeru.weebly.com/uploads/1/3/4/5/134597059/bukepogod.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/YR3ghc2/cinergy_theater_copperas_cove_texas.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/54017308935.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/iegfxsw/govuge.pdfIn PDF document text
    • https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/474878.pdfIn PDF document text
    • http://widaxaruko.mypressonline.com/72334120494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_6054e2bc223d4.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/ejemplos_de_historia_clinica_psicologica.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuxuxasezid.atwebpages.com/syndrome_pyramidal_et_extrapyramidal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74466aa-f9e7-483d-848c-4d64fceb6317/27180403652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa341ad7-97a1-4cab-90c3-80a5beec141e/78757559249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12a9cf5-926c-45d1-b7b0-a82bd4195e3b/90512816458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be90665d-05fd-4a20-a116-16e881316aeb/76323707396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c1cb0c4-8f18-4a54-a49c-83948780dbab/kaplan_free_online_sat_practice_test.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_off00012738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12738 5184 bytes
SHA-256: ba371fb8237903da1ef83662af41c477e2f0f43479a629d4af0e85fc26651069
font_01_sfnt_off000138de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DE 11364 bytes
SHA-256: eeaebd031bc4f96526f7687a29841708662302d45a1d85b29002c04b290e67cf

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