Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29a65fa6e6d4b70…

MALICIOUS

PDF

75.5 KB Created: 2021-02-22 13:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a0f9b0503b13d0223fae7a2d424e674b SHA-1: b7d03aab7e15952822a285f893eade660d07e89e SHA-256: f29a65fa6e6d4b7083f766841bd3c6ff828aa210684d3fdfada7a4945e670697
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata related to PDF generation and a URL that aligns with the heuristic findings.

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://leonvi.ru/strik?utm_term=how+to+get+business+startup+loan PDF link annotation
    • https://cdn.sqhk.co/tosilura/Oxbjdgd/81321604034.pdfIn PDF document text
    • http://scm03.ru/burnout_paradise_trophy_guideiwm9f.pdfIn PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/xuxogasezaj.pdfIn PDF document text
    • http://wordsideget.top/zozomibufuvudonoz1o98n.pdfIn PDF document text
    • http://loduxoxoba.22web.org/pemanubigusirolupiruta.pdfIn PDF document text
    • http://letgtma.bid/685964922991ne48.pdfIn PDF document text
    • http://cloudplay.xyz/vitovowesijugusetajedbqti4.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/cce584d9a04e.pdfIn PDF document text
    • https://zuwadakake.weebly.com/uploads/1/3/4/6/134664894/1506064.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/jaxgcvr/two_player_games_for_playstation_3.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/hdYAhcy/29232290387.pdfIn PDF document text
    • http://iranomics.com/is_world_war_z_free_roami7771.pdfIn PDF document text
    • http://habirovradik.ru/12032582153hx0lz.pdfIn PDF document text
    • http://bigno.space/xovufadipavujotujametooo9g1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ludatijodibop.rf.gd/wufuxelukilanitov.pdfIn PDF document text
    • http://tubulufegufixo.rf.gd/who_is_the_greatest_inventor_in_american_history.pdfIn PDF document text
    • http://gejulakan.epizy.com/asx_company_annual_reports.pdfIn PDF document text
    • http://nutulizoneket.rf.gd/the_logic_of_american_politics_9th_edition_chapter_1_summary.pdfIn PDF document text
    • http://gasigigi.rf.gd/21913579842.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 5060 bytes
SHA-256: 65ad76b12616640a16a60c68e4650e9fbd7d301013e2565bccab72243e1b7a51
font_01_sfnt_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 10596 bytes
SHA-256: 10ebab3271db0ddcf9fd99c482afe5a5e5de4d7bcc819c9cf7e57a2bc07ccb3e
font_02_sfnt_off00011294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11294 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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