Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db31efd9807a117…

MALICIOUS

PDF

71.3 KB Created: 2021-02-15 07:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0ee6332834c64160e0e97ac6635b1c25 SHA-1: eac0e9a9ab38ff8de9085f2b26a8535755c9f718 SHA-256: 1db31efd9807a117d2a8e7d4e209950e133c1f48a9e3795ee68e50309d724c8c
186 Risk Score

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://seumenha.ru/wix?keyword=perceptual+region+in+a+sentence PDF link annotation
    • https://sujepofuk.weebly.com/uploads/1/3/0/7/130775011/jamevagu_dukapa_wolomiwax_xafimepiduf.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/ericjdl/smule_sing_karaoke_app_free_download.pdfIn PDF document text
    • https://tuxuboninivufos.weebly.com/uploads/1/3/4/4/134478209/6099366.pdfIn PDF document text
    • https://jejonogukoji.weebly.com/uploads/1/3/4/8/134864124/6541.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/ac59ed57eca.pdfIn PDF document text
    • https://marikiwow.weebly.com/uploads/1/3/1/3/131379510/4314833.pdfIn PDF document text
    • https://bepifesak.weebly.com/uploads/1/3/4/0/134096259/8672605.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/aAgjhiL/21067986730.pdfIn PDF document text
    • https://tisitijalazog.weebly.com/uploads/1/3/6/0/136017937/repapejezififumosu.pdfIn PDF document text
    • https://dugiwisevur.weebly.com/uploads/1/3/1/4/131437249/5435438.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/zobox.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/4567e1.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/jjbB4ha/ice_hockey_english_league.pdfIn PDF document text
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/sekif.pdfIn PDF document text
    • https://rimofemosi.weebly.com/uploads/1/3/4/3/134351632/kidiwigip-jerutoj-fopur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wanalatuzukogax.epizy.com/xevagatogoviju.pdfIn PDF document text
    • http://mobijime.epizy.com/marcato_cookie_press_manual.pdfIn PDF document text
    • http://vekimawo.rf.gd/2675282372.pdfIn PDF document text
    • http://pabaxekuvo.rf.gd/zisegawunomor.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_off0000dbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 5100 bytes
SHA-256: 147847418f8692abf00426f3371a87ae2985c4cad69481ae57206dd6b6f90e0b
font_01_sfnt_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 10140 bytes
SHA-256: 8ca571a932180177cd0ac093fcb18ea5754cc0bf65f82994d5304f83dd6cfee7

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