Malicious PDF — malware analysis report

Static analysis result for SHA-256 1980a4c797c2b539…

MALICIOUS

PDF

69.9 KB Created: 2021-03-21 02:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3856e8d4da3e52cf3890161db6ce1f36 SHA-1: a0ae3d6d0acf6c9e004cf59422a34194c90b273b SHA-256: 1980a4c797c2b539d4c049b4d6484373cf29d3357fa5c897dc5523c48e187fef
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, with one pointing to 'ponafet.ru', suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the PDF structure and embedded links indicate a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/award?keyword=redspot+a+level+physics+pdf PDF link annotation
    • http://trickyturkey.com/xogiridapogoledozugexisogxc8t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_60279995a99ac.pdfIn PDF document text
    • http://montana-media.com/honda_outboard_serial_number_identification_year9w9bg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488570/normal_5ffcd1ccc7fe7.pdfIn PDF document text
    • http://smartbright.club/plantronics_bluetooth_m70_manual5e57h.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/8579927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448733/normal_60186914ac5c6.pdfIn PDF document text
    • http://thedopemarketing.com/2028160064v8tgg.pdfIn PDF document text
    • http://pesale.pro/ace_ventura_full_movie_720psc7y4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479240/normal_602147b367a10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476952/normal_6000af7230e3c.pdfIn PDF document text
    • https://fifiruzi.weebly.com/uploads/1/3/0/7/130775727/pusikanarolival.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/ca994bde-fefc-46b4-b326-1969b49093f4/central_machinery_drill_press_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2e7a62-2f41-41fb-987c-be67c0d73dd8/bojonupi.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_c0626e05bfdf4acd9ae1a7d05cb4ff7f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7629183c-5098-4037-82e8-fe33ddae7ef8/suxobaxuz.pdfIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_3d50767c7c4748879415d9054b7742cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c5870a-8d4d-452d-9944-94e4cda35bc7/craftsman_5hp_rear_tine_tiller_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234d1b5e-e369-4b98-90ae-7d59862548a5/sex_and_the_city_cast_season_1.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_off0000d0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 5316 bytes
SHA-256: ca3eeca94f98a6d4c81f7630bff40f6f7c0f3b1f9d1c202a19dc44e9b9420c7b
font_01_sfnt_off0000e2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 11296 bytes
SHA-256: e4e62054cd2ea8b21020d01e11b354e96961d8af56803dd991573fc29f0bf5f2

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