Malicious PDF — malware analysis report

Static analysis result for SHA-256 275a46cececf2036…

MALICIOUS

PDF

80.1 KB Created: 2021-02-26 06:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d75e6600c57ab98c34faa39c3bc29aee SHA-1: 9c3383ebb208cc0dbea037497bff79ef82923cae SHA-256: 275a46cececf20365d7afb26eab444c4e1e65da7dd3dddf1d38423251910eb82
66 Risk Score

Malware Insights

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

The ML classifier and PDF heuristics strongly indicate malicious intent. The document contains numerous embedded URLs pointing to various domains, suggesting a link farm or distribution mechanism. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate an attempt to manipulate search results or redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://bologen.ru/award?keyword=the+lathe+of+heaven+1980 PDF link annotation
    • http://umkatrade.ru/bafojesevipakawegesemapiqj53z.pdfIn PDF document text
    • https://vezinamitin.weebly.com/uploads/1/3/5/9/135984824/8f56a70.pdfIn PDF document text
    • http://dugules.iblogger.org/98437011975.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/hijesIN/fx_music_audio_player_karaoke_apk.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/slcc_accuplacer_practice_teste1t8c.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/administrator_duties_and_responsibilitiesvtf2j.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/how_to_fix_hp_printer_not_picking_up_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/hXXKugc/5323751483.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/what_are_the_physical_requirements_to_be_an_army_ranger.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/ibLiho4/jolted_definition_science.pdfIn PDF document text
    • https://labajamipudoxa.weebly.com/uploads/1/3/5/3/135399896/bezala-jibadezini-movukusarato-kalete.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/the_sims_3_generation_serial_key.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowipazivavi.epizy.com/34335653260.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/xurovogutufosipivamewe.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/protection_warrior_leveling_guide_wow_classic.pdfIn PDF document text
    • http://nogurinuzelajer.rf.gd/dezabutademapamuvutim.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/63819528406.pdfIn PDF document text
    • http://zodipez.rf.gd/16222710683.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/37677281328.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_off0000fdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC8 5132 bytes
SHA-256: 13f8b986ae22dcf8a134945fb87a91cb38aa29a2fd39f2ed7ea649797da7b3d0
font_01_sfnt_off00010f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4C 10712 bytes
SHA-256: a5c8e53193dee025bb4df6bf8de80ed64c28ead7836209e041fa5f2df278965c

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