Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8cac7f7b1372788…

MALICIOUS

PDF

68.6 KB Created: 2021-02-27 15:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b6d320b88e484f460b5fcaa44788d0bf SHA-1: 152278d6bc1efe724151bc8e4c8cb38fc47c2e47 SHA-256: a8cac7f7b1372788f81c70d9518789bace748a54b823ed53c6118ac3fc1f888c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/award?keyword=2008+dodge+avenger+sxt+transmission+problems PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375086/normal_601b56c2f28f7.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/5142836519mva33.pdfIn PDF document text
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/2537699.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/80353722285.pdfIn PDF document text
    • https://cdn.sqhk.co/kivuwutu/Hgjgc0K/x_plane_flight_simulator_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/mevojazix/ejjjjig/shattered_pixel_dungeon_roguelike_dungeon_crawler_mod_apk.pdfIn PDF document text
    • https://wojazaxu.weebly.com/uploads/1/3/4/5/134589930/mebinosirupek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_601b38ce1c739.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/tGieQ3v/freedom_mortgage_irrrl_rates.pdfIn PDF document text
    • http://canonsburglake.com/php_ajax_file_upload_without_formon4cw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rususekobijo.myartsonline.com/gubaruxoxamoropomeninolub.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/tojizenibegabesutaxu.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/zobizunaja.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/border_song_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/t-_ara_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/93874748036.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_off0000ce7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7A 5920 bytes
SHA-256: d7c5d9d63f59540d7f9782a5c4fe364e73794817f1348cf92e014c656ee23b18
font_01_sfnt_off0000e289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE289 10164 bytes
SHA-256: 42c73ce571ffa3188ce423db95ed1a7ffbad4be43d1b1f26bbac435f9ddc6ef8