Malicious PDF — malware analysis report

Static analysis result for SHA-256 841605ca2345a29a…

MALICIOUS

PDF

68.5 KB Created: 2021-02-23 09:03:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a818c2078d09c81e30599b8f42b72733 SHA-1: 81ba385629e1075746c3673918f1c87f7d92edc1 SHA-256: 841605ca2345a29a0cc85704eb1e77862dfb740368ee904f1495a00b5d5810c9
196 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wix?keyword=business+plan+of+fishing PDF link annotation
    • https://cdn.sqhk.co/sulubejes/0qliMat/idc_worldwide_smartphone_shipments_2017.pdfIn PDF document text
    • https://jukorupojos.weebly.com/uploads/1/3/5/3/135344641/zizutudovo.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/hhc6hcv/spider_mod_for_minecraft_pe_tnt.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/NRhjhia/tuwiranu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472491/normal_60182ebb786f0.pdfIn PDF document text
    • https://pemilixip.weebly.com/uploads/1/3/5/3/135330450/8897183.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/4trjhjc/star_trek_timelines_faction_event_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/bTidNVn/70039544031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_601fb8644989a.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/jx7Rzjh/latest_football_scores_bbc_videprinter.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/iajf6X4/46709518626.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/jaigZhb/pizavefo.pdfIn PDF document text
    • https://cdn.sqhk.co/kesokirow/MiOahgR/12303001455.pdfIn PDF document text
    • https://nulixosur.weebly.com/uploads/1/3/4/3/134311840/6445904.pdfIn PDF document text
    • https://cdn.sqhk.co/gesafafo/eriigcg/2177536955.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/d3iduTZ/arena_gorda_punta_cana.pdfIn PDF document text
    • https://berigagagek.weebly.com/uploads/1/3/1/3/131384675/6011588441.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/jggjFhj/bmobile_plans_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/IhheHZ7/futafulokipu.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_off0000d036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD036 5116 bytes
SHA-256: daabaf65ad5297b46ad80b9481dec871fc7853f4355e92f9ac61aecb9baf9b8f
font_01_sfnt_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 10308 bytes
SHA-256: ef623090db5aea2466567a3eea2946ec28760b26b87cdbea180e21e16e5c413e

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