Malicious PDF — malware analysis report

Static analysis result for SHA-256 119583c49ac1f23c…

MALICIOUS

PDF

90.0 KB Created: 2021-02-20 12:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3e9a8ab0a0893218e62f3ba9d26816d5 SHA-1: b09f95f2f6e76e2b92390bc3e07887430324931e SHA-256: 119583c49ac1f23c06d33374c7f2c9b550fa912616b66afc5441718604b5d789
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Paea exam driver', aiming to trick users into visiting malicious links.

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://baarspo.ru/wix?keyword=paea+exam+driver PDF link annotation
    • https://cdn.sqhk.co/golizojuw/jjicghP/island_in_the_sun_ukulele_cover.pdfIn PDF document text
    • http://storeyou.store/wisalosixiwekowolinubocxmxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383922/normal_600738a3d4493.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/zitemojibejugivukane9b0zu.pdfIn PDF document text
    • http://cosmosqrab.online/word_search_game_learn_englishrkqlr.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/gjhacjh/best_three_point_shooters_in_the_nba_today.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/wjc2UOz/49121512490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_601481d0cffd3.pdfIn PDF document text
    • http://bahis-sikayet.com/42625379236ia6a7.pdfIn PDF document text
    • http://popularchoice.space/4358909885y3quq.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/UFseF3r/sidubenegirafune.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/wizedumi/how_to_format_json_in_postman.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/56439088023.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/descargar_video_converter_pro_vidsoftlab_apk.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_off0001266b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266B 4892 bytes
SHA-256: c2d4a71dda9c822dcd6f2b001322c4a4fdc25a538ccdd91b8228fc938be26d63
font_01_sfnt_off00013701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13701 10704 bytes
SHA-256: 22895de6049db7bd47a73054c6a2857b96ca2cc3309f35f6b338b475a9464e1b

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