Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1779f92c69fd6a…

MALICIOUS

PDF

74.4 KB Created: 2021-02-19 12:16:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 36887e9c0cd22e69aeaf58346cd400bb SHA-1: 3780aad021e92e9ec424c9a859a97a2a860b4d61 SHA-256: 6a1779f92c69fd6a740a041895b6fa29fd9556e4e92033bcf37851665e20f8a3
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://leonvi.ru/wb?keyword=rear%20seat%20entertainment%20system%20installation PDF link annotation
    • https://cdn.sqhk.co/liwewajawab/cCjfhgc/animal_coloring_pages_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/gcij1ha/idle_city_building_tycoon.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/GhiJAbz/9142857841.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/hpAjibD/2827191652.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/fVrgiDe/checkers_hours_new.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/iajdiaD/tonagule.pdfIn PDF document text
    • https://wakuwuwosabi.weebly.com/uploads/1/3/0/7/130776519/2be41b.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/tobojelusiwi/13486735761.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/german_translation_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/sap_crystal_reports_13._0._20.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/ben_10_omniverse_video_game.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/what_does_dappled_mean_in_hebrew.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/eu4_vassal_swarm_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/auditoria_informatica_gonzalo_alonso_rivas.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/fogidelofemixadafuma.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_off0000e60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 4940 bytes
SHA-256: 4ed0073e7f21157b0083afcdf734956e0abf8594aa4e9a0d05e1586961d65aaa
font_01_sfnt_off0000f6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 11208 bytes
SHA-256: b358058bd2e058a5df30c67f6ef3f20ac91a44e3c76357462831366b0457a1f1