Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1d19b7d532bd54…

MALICIOUS

PDF

68.4 KB Created: 2021-03-02 06:38:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 339d4cc9de891a663fa64fbcfd12129c SHA-1: b4a82582112bef047564de8db748b4020a5ade08 SHA-256: ae1d19b7d532bd543430dd44b3f297fe7a44ecf866bf0454b9000ac7e196ca87
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the document's structure, which mimics search results, are designed to trick users into visiting potentially harmful external sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wix?keyword=mr+peabody+and+sherman+watch+online+with+english+subtitles PDF link annotation
    • https://cdn.sqhk.co/denobafopum/atjetOq/ball_blast_level_200.pdfIn PDF document text
    • http://bigakeka.iblogger.org/79568107812.pdfIn PDF document text
    • https://zogininofifus.weebly.com/uploads/1/3/2/6/132695288/4090968.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/dnic0ia/final_fighter_mod_apk_1._52._9._10.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzojivemepe/h3jcUgf/93301088917.pdfIn PDF document text
    • https://cdn.sqhk.co/lolumebitana/jhiidlc/bukigisedulezitujadunobuj.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/idphgie/puluwu.pdfIn PDF document text
    • http://kadesevi.iblogger.org/dividing_monomials_worksheet_answer_key.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/fudat.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/cgg96jb/gunshot_sound_effect_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/a9wihjf/gears_of_war_2_pc_emulator.pdfIn PDF document text
    • https://ronenajawewaxiw.weebly.com/uploads/1/3/4/5/134594127/pilasajawe.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/V1jhCji/digital_thermostat_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/87Xymgi/mobile_patrol_franklin_county_missouri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doxinaxa.epizy.com/8574728940.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/hungry_dragon_cheat_apk.pdfIn PDF document text
    • http://zunizififuve.epizy.com/95973044621.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/what_does_the_serenity_prayer_mean_to_you.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/nejofegadotivoxavinapefim.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_off0000cee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE5 5824 bytes
SHA-256: 6171d7c2a731912c4625c2f4ea696af288e6b9c172740906231f2674d947b6c2
font_01_sfnt_off0000e2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 9604 bytes
SHA-256: a042d93fdcf3f8929f45342dec20b144678889d2121b3a0a5cf47691a3119876

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