Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e7f3ceb469c1d3…

MALICIOUS

PDF

66.1 KB Created: 2021-02-23 08:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 75b0ab9edbb548b59c8fdd8e7f2d5491 SHA-1: de183cc7e4f6591c92d010da6ae9ba0f755f8adc SHA-256: 36e7f3ceb469c1d32db435d3a7e1514ae370941122842cc95d97c6390cc8aea8
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=transformers+the+last+knight+mp4moviez In PDF document text
    • https://cdn.sqhk.co/fitodofafe/QLknihr/indoor_basketball_stadium_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/fHjaZlR/8152650005.pdfIn PDF document text
    • http://supsun-aero.com/kambikuttan_net_2018fup9a.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/jaN1igc/srs_topup_system.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/xih7mjf/humanscale_drop_down_vesa_plate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_602c5aba09c79.pdfIn PDF document text
    • http://arm-watch3.club/avatar_full_movie_hd_tamila3uv1.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/pibabopuduj/anthem_inc_email_format.pdfIn PDF document text
    • http://runumebutevota.rf.gd/element_elefw328_wall_mount.pdfIn PDF document text
    • http://fajanelumaj.epizy.com/breakup_day_photo.pdfIn PDF document text
    • http://nefijojutofad.rf.gd/wopanivujifu.pdfIn PDF document text
    • http://kizarepopudoso.epizy.com/fugexufidijuxopewejesome.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/51787787642.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_off0000c5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E0 5524 bytes
SHA-256: 2bc2420ad98b58be6aa9738c86ff10c53902313a9aa4e9b17dc1e2ed62b7d78e
font_01_sfnt_off0000d891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD891 10268 bytes
SHA-256: 88c46ac16edc125a34b4bd245673735dead41f36126f68575b60c4090fa672da