Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1f158bc7aa7846…

MALICIOUS

PDF

71.2 KB Created: 2021-02-06 01:10:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 4c4aa80467ffe3225d4bd3c7313bd38c SHA-1: fcacae74dcc34592669d44030e9881ea82cf583e SHA-256: 5c1f158bc7aa78462d5dce681c10052272c73e2ab200914449c99ab8b26672e5
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=pour%20apprendre%20le%20francais%20de%20communication%20pdf PDF link annotation
    • https://cdn.sqhk.co/levuzivanu/7Lwgggj/halloween_wallpaper_iphone_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/dakubakasilu/erogfjf/ball_rush_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xixumobun/9jjjfjc/85021698330.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/iaifCJb/sago_mini_world_cracked_apk.pdfIn PDF document text
    • https://zigajimimokok.weebly.com/uploads/1/3/1/3/131383588/2a0577d26fab6c.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/1hgDifL/gt-_r_car_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/gjAB3id/tavapotagilonederajosakav.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/bjgXlja/20795594426.pdfIn PDF document text
    • https://cdn.sqhk.co/pomijatan/ijgf0cN/40905502598.pdfIn PDF document text
    • http://astropsychology.website/media_encoder_cs6_full_crack3x7gt.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/vMjhvja/gravity_trampoline_park_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/gidTgc9/silicon_valley_season_2_episode_9_cast.pdfIn PDF document text
    • http://faceit.su/anatomy_of_the_spirit_free_downloadiq2cw.pdfIn PDF document text
    • http://nefritthebestthing.site/zulijapijavamirunomujutzdmc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozadel.epizy.com/70488328439.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_off0000d2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E8 5300 bytes
SHA-256: 552a41684a0b71c8b1417b4cb07b81c077b1f7a070243a387fd73cd90c5b0081
font_01_sfnt_off0000e4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DF 13088 bytes
SHA-256: 97944d884a17be07d2c95d4c86f686cf3d46e73c7641a5f54b387773659f1d29