Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ec8e80fd712039…

MALICIOUS

PDF

74.3 KB Created: 2021-04-16 04:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 086c18ef1c1e886a9aba9ec4e5dec9f9 SHA-1: d8592a3c5e4ec1686a1a66a6d803fa706a04d4e0 SHA-256: a0ec8e80fd71203965ef7491ee4bc92b3f0869c16569dbf052035d3bb0dd5320
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=dykes+to+watch+out+for+pdf+free PDF link annotation
    • http://vnds-super.space/desulekuzemenosapg77.pdfIn PDF document text
    • http://helpcenter.business/35436262193dwbd8.pdfIn PDF document text
    • http://zofugef.mypressonline.com/building_engineering_handbook.pdfIn PDF document text
    • http://get3creditscores.info/no_game_no_life_manga_volumesxfkxk.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/braun_series_7_mens_rechargeable_wet__dry_electric_foil_shaver.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/obstructive_and_restrictive_lung_disease.pdfIn PDF document text
    • https://fopizute.weebly.com/uploads/1/3/4/3/134315067/8466b5461364d.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/bacterial_cell_wall_structure_and_function.pdfIn PDF document text
    • https://naxaletuzo.weebly.com/uploads/1/3/4/5/134508506/muxopole-wajofojerer-rolesaxi-wizovuvub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_5fe90845e4012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5fea0504378a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450138/normal_606287f308ecb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365594/normal_5ffb2f5dd12a5.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/risokosamupibed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://riledabetime.myartsonline.com/lonepufizuwamo.pdfIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_a1a5c8a999a5493ba17e381b37690175.pdf?index=trueIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_d4a903c1ba8b4596b3a0fccef1ebcb71.pdf?index=trueIn 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_off0000e39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39D 5468 bytes
SHA-256: 9764d50b5e6b590a36316fbbe5099689856e47bf9b34a8fd1dd275d46d9449d0
font_01_sfnt_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 11116 bytes
SHA-256: 374af995717c3e647da8ff733efc57cca03b1f5168f03a367d9a308ab1098266

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