Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d338ad6c85de0a…

MALICIOUS

PDF

68.2 KB Created: 2021-02-12 03:56:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bd3e2b72810eb64c73ccfc6f6c6a3dfd SHA-1: 399c0ea4627a509b1047cf4495860f673ca313b4 SHA-256: 54d338ad6c85de0a81b3c2ae4e9784b65870a8fe91241578e874244e80d1c392
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/wix?keyword=jatavia+johnson+mom In PDF document text
    • https://cdn.sqhk.co/desiruzag/fibZt36/4719243841.pdfIn PDF document text
    • https://japilulijerimu.weebly.com/uploads/1/3/0/7/130738614/1321447.pdfIn PDF document text
    • http://uaportal.site/k_konu_anlatmsp9q9.pdfIn PDF document text
    • http://workbykoder.xyz/73569899484s4qpv.pdfIn PDF document text
    • http://starkrobotics.org/444936358913ppi0.pdfIn PDF document text
    • https://cdn.sqhk.co/didozakir/aWLhaHs/miralax_directions_for_toddler.pdfIn PDF document text
    • http://profer-opt.ru/521232141448jfsg.pdfIn PDF document text
    • http://detonic-ro.website/esl_adjectives_to_describe_personality7jj4c.pdfIn PDF document text
    • http://centerbluebadge.com/monster_trucks_racing_2020v9q1b.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/jCghjfY/dejaxubujizoxenitavesozat.pdfIn PDF document text
    • http://iciko.xyz/15652107303yqopg.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/dog_wallpaper_full_hd_downloadyvxxy.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/big7Xgg/dojokejudisovufowe.pdfIn PDF document text
    • http://axecheat6.xyz/hdri_forest_3ds_max_2020kqhvt.pdfIn PDF document text
    • https://cdn.sqhk.co/webunojixisa/dgjgdhj/rummikub_4_players_how_many_tiles.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_off0000cf53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF53 4924 bytes
SHA-256: 95391b979d14e426df07a9d491e1c6eb653a3f0dfb7a104a7482f02ad88bdf0c
font_01_sfnt_off0000dff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF9 10584 bytes
SHA-256: 8025faff8a9f07d74eff85c2e5162c28bec3ffc790553b768b74a2a29f0ef732