Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbf2773aa2c979b…

MALICIOUS

PDF

76.0 KB Created: 2021-03-15 23:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5ae11319fc978528782348f740c75db1 SHA-1: 9a41e249e685d5240efedaa6894273b8b85d5bf9 SHA-256: ccbf2773aa2c979bb3d2f85523331c68bc5951b9afb89e7f9ae004545f2de324
126 Risk Score

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 0.9996

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://xajibur.ru/strik?utm_term=black+and+decker+20-volt+lithium+battery+and+charger+combo PDF link annotation
    • https://cdn.sqhk.co/jesisoritet/ijaoDs6/employee_self_evaluation_goals_sample_answers.pdfIn PDF document text
    • http://copyrighthelpcentral.com/10_000_reasons_matt_redman_lyrics_and_chordsz9fmx.pdfIn PDF document text
    • http://edaruzal.xyz/anime_girl_background_phone5ydf3.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/jeqhgib/ibiza_rocks_event.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/icLhcge/lolijivokad.pdfIn PDF document text
    • http://dkblogin-de.com/pathfinder_kingmaker_valerie_portrait_mod1t7vs.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/gijepoxubizorukugata.pdfIn PDF document text
    • http://reduslimitalia-official.website/885481893269hhfe.pdfIn PDF document text
    • http://fimewot.xyz/zolalomewupovn6zs0.pdfIn PDF document text
    • http://monongzhlh.space/by_the_waters_of_babylon_phrase_meaninguxk6t.pdfIn PDF document text
    • https://cdn.sqhk.co/vusopukov/ihhgLxq/likee_apk_free_download_for_pc.pdfIn PDF document text
    • http://lamiwefawiwa.iblogger.org/new_survival_movies.pdfIn PDF document text
    • http://copyrightsupport-ig.com/bose_ae2_pairing9wshx.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/Vhhgekd/magic_tiles_3_opening_song.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/ihCZghd/45199129452.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/thfhgrU/39844656689.pdfIn PDF document text
    • http://tranquils.space/bakazamek7qv0x.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazezikufi/jaheFjj/adobe_acrobat_x_std.pdfIn PDF document text
    • http://jefigesawek.iblogger.org/company_of_heroes_2_ardennes_assault_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://segidamilezuv.epizy.com/vuwiseramadewizo.pdfIn PDF document text
    • http://bagegamejejupu.epizy.com/happy_birthday_daddy_song_pagalworld.pdfIn PDF document text
    • http://vaburerewixa.rf.gd/13047509305.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_off0000e8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F6 5896 bytes
SHA-256: aa0819a7cbe2b9cec2f95a1bfc39736968742e6b65e927cb1d339737a7cb052c
font_01_sfnt_off0000fcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEE 10976 bytes
SHA-256: 88cf68e26451bd24e359b2118e281dc5a8fc314a09254a91b068e5cb894c3c85

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