Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6b3c9d9f652e18…

MALICIOUS

PDF

66.6 KB Created: 2021-02-11 18:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 857a3a8a39b3a6f3649ca4e13e924511 SHA-1: e16dbf64b0d689a3482c42ef01ce1966d5dd9e8d SHA-256: df6b3c9d9f652e18d3759e867a7ed614dd31f8fc22841667f5c06296cd7c527a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=az+adot+manual PDF link annotation
    • https://cdn.sqhk.co/tarekekog/6ZggBHM/grab_driver_didn_t_pick_me_up.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482230/normal_5ff9880b94893.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384030/normal_5ff89cef28fc1.pdfIn PDF document text
    • https://mosezusimoz.weebly.com/uploads/1/3/1/6/131637881/cbbffaa6b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379483/normal_5fe0104935eaf.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/ghiehcv/mutant_fighting_arena_cup_2.pdfIn PDF document text
    • http://1pokypki.website/peter_flach_machine_learning48khg.pdfIn PDF document text
    • http://mebel-albero.ru/practical_astral_projection_harama4jp1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5fecee6c047fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381090/normal_5ff96f2558eb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486987/normal_5fc8a484f32cc.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/XgehhOO/the_amazing_candy_world_of_gumball_characters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xurixado/catia_learning_ebook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/best_ipad_pro_app_to_markup.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/abhimaan_bangla_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/basotoninifatopufanowaz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD1 4452 bytes
SHA-256: c80afb8ff1c16a87192c56e64cf5d7d0f63b712fa5f327b765363c6b0da0a52f
font_01_sfnt_off0000cbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD2 10496 bytes
SHA-256: 557f599d53f321a984a8bad046c399c8ce21977053bfa3de5583d813eb7f59ca
font_02_sfnt_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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