Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e42f0d1eaa6ed0…

MALICIOUS

PDF

69.0 KB Created: 2021-02-24 02:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 213288395181de2916ba4a840aee65a7 SHA-1: 790ae3d4bb12c910a2992f6736898183d63ca760 SHA-256: 85e42f0d1eaa6ed0123420c1844f5ef2c5c18f7e0dc9b76324d417af86d04886
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://bologen.ru/wix?keyword=linear+and+angular+speed+worksheet PDF link annotation
    • https://cdn.sqhk.co/muxaferamet/hagghHl/what_color_symbolism_christianity.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471995/normal_5fd7e3e014ec5.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/gg9geaK/game_companion_watch_dogs_2_pc_highly_compressed.pdfIn PDF document text
    • https://rofupujo.weebly.com/uploads/1/3/4/3/134335987/mesodiga-josufafatinew-wediwadenasa-riwok.pdfIn PDF document text
    • https://cdn.sqhk.co/xetokive/aWkMnje/boy_games_for_free_online_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/jdidvEm/38620327841.pdfIn PDF document text
    • http://ligorowimilupux.22web.org/53404702071.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/bsjhkcG/homeschooling_in_texas_curriculum.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/BheRhcS/smart_tv_65_inch_lg.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/jia7Zgc/lisufedapamesubizobemubu.pdfIn PDF document text
    • https://sulunekuzesafap.weebly.com/uploads/1/3/1/4/131406846/50612.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/gdhfLjd/67609585760.pdfIn PDF document text
    • https://gusotefatimadi.weebly.com/uploads/1/3/1/6/131636747/leweperonuxubu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://biborufa.epizy.com/75085324685.pdfIn PDF document text
    • http://renaxederopuva.rf.gd/what_lens_is_best_for_portraits_nikon.pdfIn PDF document text
    • http://gesinofafag.epizy.com/ego-t_battery_review.pdfIn PDF document text
    • http://dixasobif.epizy.com/what_do_self-destructive_behavior_mean.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_off0000d131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD131 5320 bytes
SHA-256: c88873b963e22c91a79e8ac3ed267175c3852d8adfa4bddc64b988c3cca66290
font_01_sfnt_off0000e359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 10356 bytes
SHA-256: ada06e44f5a0b5bdbf552079eb9174e98f270a87ff83ce865eeb0ad952a416e0

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