Malicious PDF — malware analysis report

Static analysis result for SHA-256 5474fd9a1b799512…

MALICIOUS

PDF

63.9 KB Created: 2021-02-20 09:48:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3118355619881346e863e26ba7eb546d SHA-1: 2a15f35cd3654a5c83fb79fe565b51e78bafa83c SHA-256: 5474fd9a1b7995123bd2e4956a0b32387434424685f5451240e66f6beb653586
244 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
  • 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 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.
  • 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/aws?utm_term=how+to+use+elgato+hd60+switch In PDF document text
    • https://cdn.sqhk.co/detatakev/hvsjbjd/1570267554.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/jhibahf/lenuvize.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/GgdOuha/dodoboxadusuzevelubu.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/Hibjjuh/15646742028.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/gDrNhel/71804976681.pdfIn PDF document text
    • https://cdn.sqhk.co/wusuzevomo/Hiborjh/sutereluwajibinenuvuxete.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/kawiwabemi.pdfIn PDF document text
    • http://gayerkan.com/functionalist_perspective_on_crime_and_devianceszzbg.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/fhhifwm/32984768300.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/jgvYhd9/40935319980.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/dejilituxumowekap.pdfIn PDF document text
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/robemamajamawaf.pdfIn PDF document text
    • http://goods-amzon.com/10017458887vcyun.pdfIn PDF document text
    • http://vykupavto54.ru/callaway_big_bertha_alpha_adjustment_guidelh6x8.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/vetamedisoz/wamevoxusimo.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_off0000be95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE95 5456 bytes
SHA-256: c2f2950180924da98ee3d84a79d483cb66d4630456d4ce03c7d964883d406365
font_01_sfnt_off0000d12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12A 9788 bytes
SHA-256: 4e0ac86571d6d34bc143ed948b6cebd7a5d5db7c7c5a1b564e6cb45766d911da

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