Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14a322ba0d95cd1…

MALICIOUS

PDF

78.3 KB Created: 2021-06-07 09:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ea9cce2e3f16c4508800fd7a2d3a678e SHA-1: e04db279608853cbfae42ad7405b642d44036ed9 SHA-256: c14a322ba0d95cd188246721c396cfc4ae32c0457be23c2cde45594ae124e41e
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 0.9997

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://garglob.ru/pbw?utm_term=download+streets+and+trips+2013 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420245/normal_6062c54bb5ee0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454968/normal_603a559ad7b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_60bb7b689d129.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491671/normal_5ffc7f66dfaa1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jebodigezev.pbworks.com/f/genepitulukotaxamujudizis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a254e1-b307-4532-b113-0cb50b287c31/55822612435.pdfIn PDF document text
    • http://xetuduju.pbworks.com/f/mozelegasitubonosumese.pdfIn PDF document text
    • http://fevosezew.pbworks.com/w/file/fetch/144697881/4112006752.pdfIn PDF document text
    • http://xozojonurom.pbworks.com/w/file/fetch/144555723/traductor_de_espaol_a_ingles_americano_con_audio.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144561663/95472417139.pdfIn PDF document text
    • http://kivotin.pbworks.com/f/transformers_revenge_of_the_fallen_pc_game_highly_compressed_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbd4e8d-667b-4482-b6b2-3fc6f29fc27c/how_to_adjust_carburetor_small_engine.pdfIn PDF document text
    • http://pejokawigar.pbworks.com/f/lewurafivijojatur.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144460905/bisi_alawiye_live_song_download.pdfIn PDF document text
    • http://gapufipi.pbworks.com/w/file/fetch/144657285/77512502391.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_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 5532 bytes
SHA-256: 8731a0b51b7e7b5d11dfe18eb502ca1b5baf64245d4a6dc448c536598d28432f
font_01_sfnt_off000104b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B7 11748 bytes
SHA-256: 5c8cf49347a534962c95695d26556c56b7861e7174dfb987f29e3a8877df1b28

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