Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a48e8bcf4dc4db…

MALICIOUS

PDF

82.0 KB Created: 2021-03-11 13:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25c5287ac0ba368a95e34c7c816b3f99 SHA-1: e6929ee57d090fe79f75343b8c5a7d15ef0d571f SHA-256: e4a48e8bcf4dc4db8d38692c3f4a0b036beb43b233e442e88b707a2eb695c80d
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded links, many pointing to disposable hosting domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords related to benchmarking and book PDFs, likely serving as a pretext to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/award?keyword=benchmarking+book+pdf
    • http://sowopezamiw.medianewsonline.com/how_to_program_the_quadratic_formula_into_a_ti-84_plus_c_silver_edition.pdf
    • https://static.s123-cdn-static.com/uploads/4489264/normal_5fdf365c5682b.pdf
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/112fb11ecec05cd.pdf
    • http://jugepawe.medianewsonline.com/suzapurawosope.pdf
    • https://cdn-cms.f-static.net/uploads/4503533/normal_6037171f83970.pdf
    • https://fapojenulexo.weebly.com/uploads/1/3/1/3/131383319/tesovitalivuv.pdf
    • https://static.s123-cdn-static.com/uploads/4489033/normal_5fc61228d78d4.pdf
    • http://pinenud.mygamesonline.org/catholic_catechism_book.pdf
    • https://cdn-cms.f-static.net/uploads/4408866/normal_6048716e4704c.pdf
    • http://gatowixipeba.mywebcommunity.org/66365816766.pdf
    • https://sejerujezoxovod.weebly.com/uploads/1/3/1/3/131398555/3536166.pdf
    • http://xuzerujagojagip.scienceontheweb.net/autodesk_3ds_max_shortcuts.pdf
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/6008773.pdf
    • https://jabizujosewej.weebly.com/uploads/1/3/4/5/134584717/wizorilapinegu-sogadode-dekekow.pdf
    • https://tezagezowuvese.weebly.com/uploads/1/3/0/7/130775310/xidupepub-xujizobi.pdf
    • https://tekuxarutupun.weebly.com/uploads/1/3/0/7/130775258/jojiw_jebag.pdf
    • https://cdn-cms.f-static.net/uploads/4486054/normal_5fd30c40aec2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tejuvonixag/16214294832.pdf
    • http://bogalibamadom.myartsonline.com/photive_s10_bluetooth_speaker_review.pdf
    • https://s3.amazonaws.com/potofaw/animal_farm_allegory_chart.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010391.bin
c95ef6f5f11a9c5f89c28e70c28ae4f80f1006f4ad2cbbee63ee211aece4084f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10391 5612 bytes
font_01_sfnt_off0001167c.bin
1e29c38f4e50f5ad3b699f72acee7f3dbd10474da801503cb801b464668e295d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 10636 bytes

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