Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be1094f35a7b762…

MALICIOUS

PDF

97.4 KB Created: 2021-02-17 10:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c341b3cd3498308c7334bd806152e129 SHA-1: b979533744f318501c72497ac43b3f8d136d1547 SHA-256: 4be1094f35a7b762268f714df196d34022b9c57de4a8febef06dfcb94f998002
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=ma+road+test+vehicle+requirements PDF link annotation
    • https://cdn.sqhk.co/xixujipum/hdgdjd3/figafimosumur.pdfIn PDF document text
    • http://dirugalaw.22web.org/king_size_flannelette_sheet_sets_argos.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/Yhjgjhf/fall_guys_ps4_price_free.pdfIn PDF document text
    • http://demigatakubap.iblogger.org/endless_summer_book_3_notebook_answer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_602428a20aeae.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/lightning_mcqueen_cake_topper_templatep9y03.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/fjbigmt/offline_games_2019.pdfIn PDF document text
    • http://j3vnci4.xyz/vapanepikekuxugolilutokadyggg.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/xdghrii/kontravoid_cost_of_life_lyrics.pdfIn PDF document text
    • http://generatorsale.ru/dukilan9pks.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/4jbhhhe/25273246667.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/p4miiie/zarafozajakuxuregig.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/idIZLih/13822514747.pdfIn PDF document text
    • http://mixed-rootwork.com/top_hip_hop_music_cleanaiwyj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bokexizometun/21598271378.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/english_nostalgic_songs.pdfIn PDF document text
    • http://sikofus.epizy.com/haloperidol_injetavel_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/crossword_answer_for_useless_person.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/bluetooth_for_computer_windows_7_free.pdfIn PDF document text
    • http://feliruxitekul.epizy.com/airtel_xtreme_android_tv_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13322 5252 bytes
SHA-256: a5b9489d8831c4971b1f1830394d843739efbbafa3ca6d7b7f782fc69bf28f9e
font_01_sfnt_off000144da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DA 10872 bytes
SHA-256: e25bdd514f90615b85e4ee8867699cc940c0f6f054b02ab4b4fc9802fb03b5bc
font_02_sfnt_off000169a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A2 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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