Malicious PDF — malware analysis report

Static analysis result for SHA-256 844061927b4af25b…

MALICIOUS

PDF

70.0 KB Created: 2021-02-11 21:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bd2dc33efd680ad9a70fa999318199cf SHA-1: afa2ee407b6f0ea8c6b76de0466a979f1fe3ff84 SHA-256: 844061927b4af25bd74c8987e281a89f658c2d0ef1ba6f21a4a972a4a243e246
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=a+first+course+in+systems+biology+voit+pdf In PDF document text
    • http://smartbright.club/dettol_antibacterial_surface_wipes_safety_data_sheet2m2m1.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/hgii7aQ/flightstats_app_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479675/normal_5fdb2731916c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5fd2836e26b8a.pdfIn PDF document text
    • http://dmgameplan.com/probability_theory_and_examples_soluvjify.pdfIn PDF document text
    • http://chambre.xyz/word_riddles_and_answersqqn6t.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/ninezolezulonivonaxelimujcb4b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fcf4c015979f.pdfIn PDF document text
    • http://udilische.club/dofasvyc6v.pdfIn PDF document text
    • http://wbigs.space/75618742341j9c3t.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/Ufhcia5/nigijil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500201/normal_5fff084bc21a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470828/normal_6000324fadb2b.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_off0000d652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD652 5556 bytes
SHA-256: caad5678ad17b65ea42ed63b83082b916a0b82d147d59a1222102ae8cb01aa6c
font_01_sfnt_off0000e933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE933 9972 bytes
SHA-256: cf83af4cdb43075c6da757ea71ae1f46a63b888e24f5892b9ea0cc35366ba0ab