Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf41be9fdf32efb…

MALICIOUS

PDF

69.1 KB Created: 2021-03-02 13:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: db2d213bfc6371e38d08fdb10299b75b SHA-1: c3273f12e623401fb5356b9144387b2d7c2fedb0 SHA-256: caf41be9fdf32efbd5451a198bf66c6b9b69fffcdae3e2bc9f638276b7d4eadd
126 Risk Score

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://vilenefex.ru/award?keyword=material+safety+data+sheet+for+chemicals+pdf PDF link annotation
    • http://bonuwefuganagus.22web.org/yamaha_rx_v667.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/skil_15-amp_7-1_4-in_corded_circular_saw_review.pdfIn PDF document text
    • http://baby-slings.ru/wumedexalerosejekug2geeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_600e7f4d55d4f.pdfIn PDF document text
    • http://baffer-shop.space/algebra_1_exponents_review_worksheetjdufg.pdfIn PDF document text
    • http://circleshtang.xyz/ruvajrnw5k.pdfIn PDF document text
    • http://shoop-fk.ru/case_1816_service_manualqwiuk.pdfIn PDF document text
    • http://dulexip.22web.org/neurontin_weight_gain_information.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/webomajezazelixonimotoxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410030/normal_5fcb1003cd23d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dudijujixafag.rf.gd/lixelolewogalur.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/free_personal_bio_data_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/is_there_an_ottawa_sun_paper_today.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/38846786852.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/abcd_telugu_movie_video_songs_mp4.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_off0000d297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD297 5500 bytes
SHA-256: 4240bf9f0f3423e052b19bbd39aeea0326237bbbeeb1de69b8ffed7b4226ea67
font_01_sfnt_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 10016 bytes
SHA-256: 34e2d983c4b35c68b1bb07d3165011425ecc8d709c5f62ba411aa99c552dd95d