Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2c6fda2ec5eea8…

MALICIOUS

PDF

81.6 KB Created: 2021-05-13 12:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f5908ddf770d566efc0374fe78c04cef SHA-1: b8185af7595ecc4dd9e0a8e592a78916420a301b SHA-256: cc2c6fda2ec5eea89638315d1526678299e547a1aa47a56c05ccaa042fa74569
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=what+are+the+three+products+of+aerobic+respiration PDF link annotation
    • https://cdn.sqhk.co/kamozipu/bV7EgeM/airport_scanner_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/gCgi0gf/22886511578.pdfIn PDF document text
    • http://sikakapu.medianewsonline.com/aroma_english_textbook.pdfIn PDF document text
    • http://zetumitufam.mywebcommunity.org/beethoven_piano_concerto_5_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/wametofenuwo/2hege3g/9558161946.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382187/normal_5ff7d13b3736b.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/hugeChe/how_to_make_dragonfly_paper_airplane.pdfIn PDF document text
    • https://cdn.sqhk.co/ponatabet/tggjilw/zuzubujuzel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_603ee01ca0a26.pdfIn PDF document text
    • https://cdn.sqhk.co/xazewizol/iiMZUii/5116673643.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/balance_of_payment_concept.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/fjjjIgg/protecting_the_president_bodyguard_secret_service_agents.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/2iiIRhi/ultimate_offroad_simulator_mod_apk_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497093/normal_603bc802cbf7c.pdfIn PDF document text
    • http://kogowetek.getenjoyment.net/fish_farming_business_plan_in_india.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japinoxizidunub.myartsonline.com/retezedewegoxap.pdfIn PDF document text
    • http://varirojemixu.myartsonline.com/peshitta_bible.pdfIn PDF document text
    • http://gudukiderunusu.myartsonline.com/astm_a182_15.pdfIn PDF document text
    • http://gofumakexoj.onlinewebshop.net/31359720759.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/monday_through_friday_calendar.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_off0001015c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015C 5364 bytes
SHA-256: b28637c6fbddb47c2a76afd2c57b3e175f8b0eba451e6b59c9e74c9d3169c175
font_01_sfnt_off0001139e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139E 10892 bytes
SHA-256: d463ed85eb05592c81fff426b3c4c125caa60431999955866cd0395f682c792b

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