Malicious PDF — malware analysis report

Static analysis result for SHA-256 028012d6b1f1a84c…

MALICIOUS

PDF

90.1 KB Created: 2021-04-05 18:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e19ba4ff41833354afcd961548915387 SHA-1: 58434b23736dc1194cd994cf468057931aea0bf8 SHA-256: 028012d6b1f1a84c30a8350678df71b502d1d0b19630b01736a496671344604b
134 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm on disposable hosting, with embedded URLs pointing to suspicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text that attempts to create a sense of urgency, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kuzutuzo.ru/123?utm_term=wes+evaluation+report+validity PDF link annotation
    • https://cdn.sqhk.co/dabigewom/3UbDuck/51329996151.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/tuzeguwiserasi.pdfIn PDF document text
    • https://cdn.sqhk.co/gumoxixo/KgdIjgk/gekogurekew.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/gjvwrZ9/video_download_for_tiktok_premium_apk_without_watermark.pdfIn PDF document text
    • http://xanejog.medianewsonline.com/sifutajegulexovu.pdfIn PDF document text
    • https://cdn.sqhk.co/xamewivuvus/nh8bp0h/18169953899.pdfIn PDF document text
    • http://vijofogozorumi.22web.org/5769304632.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/47629503045.pdfIn PDF document text
    • http://wetiludivarag.scienceontheweb.net/how_to_write_the_electron_configuration_of_an_element.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/jcJiigf/padivuwiravulonevepike.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/iLjgVgj/negin_mirsalehi_husband.pdfIn PDF document text
    • http://dududuw.mypressonline.com/dusexixejekiguv.pdfIn PDF document text
    • http://pisufixefonof.scienceontheweb.net/gunelutazometir.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/42brghq/car_driving_game_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidatoxo/7heFje0/rikizoneberufevivi.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/xajowu/dexter_washer_for_sale_craigslist.pdfIn PDF document text
    • http://gisudaledusuroz.rf.gd/grade_12_pure_maths_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/marriage_not_dating_episodes.pdfIn PDF document text
    • http://zakuvusebaj.epizy.com/16211647483.pdfIn PDF document text
    • http://purezaviwof.myartsonline.com/ganpati_aarti_sangrah_in_marathi.pdfIn PDF document text
    • http://binutux.rf.gd/jolly_phonics_reading_books_level_1.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/19937835659.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/14987925187.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12051 5128 bytes
SHA-256: 0fce1bb26cdb7b83e96914967aa5dfa7400baae1424e2c2379236886469d3e9f
font_01_sfnt_off000131e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E5 11540 bytes
SHA-256: 9c6d31272730fad8b542887dd63d03b67324b512ed9380844483752c39ffc771

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