Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a06d607cc19b48f…

MALICIOUS

PDF

73.7 KB Created: 2021-02-24 23:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 16450be2d1230ea365663eb18b5e51d6 SHA-1: 136a4935715e8efcccf8101e14c86fcec77d4617 SHA-256: 6a06d607cc19b48ff2ce1c83c976f98e5440842d8a30d1187a1b40c5370f8fcc
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://seumenha.ru/123?utm_term=rsmeans+online+free+trial PDF link annotation
    • https://vopoxeja.weebly.com/uploads/1/3/5/3/135346001/84220e5a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373770/normal_5fccc1c20ab2d.pdfIn PDF document text
    • https://nanoxoxudotu.weebly.com/uploads/1/3/0/8/130814682/f8dbbe2c1e76.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/what_we_talk_about_when_we_talk_about_love_espaol.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/how_much_does_a_program_manager_make_at_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5fe6aa5ac60a3.pdfIn PDF document text
    • http://terugate.mypressonline.com/18484247144.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/sex_education_season_3_release_date_countdown.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486537/normal_5fdc8122be62f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wetevali/manuela_boy_lyrics_meaning.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/polaris_280_parts_wall_fitting.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/what_size_tires_fit_2007_jeep_grand_cherokee.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_off0000e414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE414 4920 bytes
SHA-256: 1f01198f2e5bc4353d7f082c1ac33b6d18a395b93c81f0489fc69da4887c8aeb
font_01_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 11260 bytes
SHA-256: 1c2f43e5c2d94c97b7dee787db2f385cda7b3744b1ae42c100d10b95d2124ca4

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