Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf02670f10979aa…

MALICIOUS

PDF

73.1 KB Created: 2021-03-02 17:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 84d1be746274c6ae8be2290265e4dc62 SHA-1: eb4d73a02d2b258262f8d131414beacf34b082d6 SHA-256: 6cf02670f10979aab64bfa87ff38e603c2ddc09c5f9148a0804ee4249a890c58
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://golowaki.ru/award?keyword=how+do+u+describe+a+rainbow PDF link annotation
    • https://cdn.sqhk.co/surikuzezun/vggiahi/rijozaduz.pdfIn PDF document text
    • https://fibupodofakakov.weebly.com/uploads/1/3/4/4/134496100/naxebikekeki-vaduxonofu-zatigud.pdfIn PDF document text
    • https://vobanugan.weebly.com/uploads/1/3/5/3/135340106/6343330.pdfIn PDF document text
    • http://50offshop.info/army_acft_field_manualg2xw3.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/ihgjjhF/rukakomupurojemorave.pdfIn PDF document text
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/00cf6eb87.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/cSEjjfK/game_show_buzzer_sound_effect.pdfIn PDF document text
    • https://wokiliga.weebly.com/uploads/1/3/0/8/130814475/8cb8ae0c0c8836c.pdfIn PDF document text
    • http://golosa-spasibo.ru/daniel_kahneman_thinking_fast_and_slow_sparknotesmt4l1.pdfIn PDF document text
    • https://lejujazu.weebly.com/uploads/1/3/5/3/135337057/5215500.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/wqUhigi/gifipidaxela.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/bd2b89277cf.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/cjfjdZ8/46295738601.pdfIn PDF document text
    • https://sejixegagetuta.weebly.com/uploads/1/3/0/9/130969850/c0fb28bc24f.pdfIn PDF document text
    • http://help-violation.com/yamaha_rx-v473_receiver_manual7by08.pdfIn PDF document text
    • http://normal-id.com/mebutoxabuxenuninuj4l91o.pdfIn PDF document text
    • https://zasefupaboz.weebly.com/uploads/1/3/2/3/132302972/jenaju.pdfIn PDF document text
    • https://jezulusawuse.weebly.com/uploads/1/3/4/0/134000263/91f8ef6242b32f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 5092 bytes
SHA-256: 437c101cf0cfd0b7167399e5d531b8dd5f65e056c8d31c3a1191aaff0dcc2b9d
font_01_sfnt_off0000f341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF341 10768 bytes
SHA-256: 1c2cfbf007a01c69e0a0317ce8ea8dad2929ec3bf012227a3e2d936044d7d56e

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