Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce212f68c0700cc…

MALICIOUS

PDF

68.7 KB Created: 2021-02-27 10:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9bbeb92ee623cd9f99865ab2242c45f5 SHA-1: 5cd711afff303e9986dc61233eb09f8f2db71668 SHA-256: 6ce212f68c0700cc4ae0631a8be873960b20acd1191928556fb0c36b0df019fc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=kubota+l2600+owners+manual PDF link annotation
    • http://nature-ital.space/nujubepexezevomadh8e.pdfIn PDF document text
    • http://vanesifonemume.22web.org/arrire-_plan_flou_automatique_apk.pdfIn PDF document text
    • http://pycnidwzxc.info/steampunk_puzzle_brain_challenge_physics_game_answers2d51m.pdfIn PDF document text
    • https://kukavijeri.weebly.com/uploads/1/3/3/9/133997324/paxogal_gofigarun.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/hgij9LF/solar_system_formation_simulation_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/ghjey33/powagujanamu.pdfIn PDF document text
    • http://bodyita.space/jivazubolew185sc.pdfIn PDF document text
    • http://artdebug.site/xosijuxutoriwujexedefi6any.pdfIn PDF document text
    • http://tuvuleworejuxi.22web.org/39432189829.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/lifison_laluluxibemonuk_kogukixito.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/CjfQxhh/rikopadupewisekokasazik.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/jedatuso-gibimuwurutozuz-buxewu.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/swbhi6V/line_driver_encoder_wiki.pdfIn PDF document text
    • http://keepsufi.space/irobot_roomba_i3_vs_e5e0e08.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/hhiDwjf/singing_machine_classic.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/jejulurowev/casualty_loss_deduction_form_4684.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/possessive_adjectives_practice_worksheets.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_off0000cf37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF37 5460 bytes
SHA-256: b39db17f8547f2b8473717302206b456ca37c5362cdc8dfe21b0b6c02a0ccbe8
font_01_sfnt_off0000e1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CA 10532 bytes
SHA-256: ef717f760ec374d985838e931ad22a2842daae8a079fe1c10ee514563bb7d353