Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4a3d94bf8a0c33…

MALICIOUS

PDF

68.2 KB Created: 2021-02-14 00:00:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 73f1a8b57b0314c8b1edf79c1e4dbf3b SHA-1: d712276b0daf0b8eceda0a56097a375f2df9d1af SHA-256: cf4a3d94bf8a0c333656a442d0fce389839abb04b350b753f309d006c6a61ffc
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://druttle.ru/wb?keyword=baby%20rhymes%20english%20video%20song PDF link annotation
    • https://tobivuzulukimu.weebly.com/uploads/1/3/1/3/131384599/befinibefawa_tibenutituvok_tezogo_zubupagenu.pdfIn PDF document text
    • http://zoluvukabufe.iblogger.org/27441234842.pdfIn PDF document text
    • https://mipoxijal.weebly.com/uploads/1/3/4/7/134709746/2975072.pdfIn PDF document text
    • http://sukujemegamog.22web.org/life_after_apk_obb_english_version.pdfIn PDF document text
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/zubodeke.pdfIn PDF document text
    • https://nabovuguxobe.weebly.com/uploads/1/3/1/8/131871891/bf997c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojogonofar.rf.gd/i_mx6_dual_lite_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/building_drawing_n2_textbook.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/bole_chudiyan_full_song_pagalworld.pdfIn PDF document text
    • http://luzawuwu.epizy.com/22018147579.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/conjuguemos_tube_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/spotify_time_limit.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/hotmail_login_page.pdfIn PDF document text
    • http://bujazux.rf.gd/81898051210.pdfIn PDF document text
    • http://vevubajiziju.epizy.com/76700312172.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_off0000cd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD74 5588 bytes
SHA-256: c4dfa52c7de989689754d6bbf3bc8d596b9dfad1f59bee48de4f51d8af66ae8b
font_01_sfnt_off0000e050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE050 10388 bytes
SHA-256: 343a0296394756f5e9ebfff87cc3902092d1ccb79d4ddf65ad5d1ea4b87f1558