Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2e1297ab8de476…

MALICIOUS

PDF

77.2 KB Created: 2021-03-02 23:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4d0f1c37595e9ad2210886cd6a5191a5 SHA-1: 51dac1a0cb01767313ee729ec0a21ceb33d56765 SHA-256: 0a2e1297ab8de476ed2c9f2acb934c6e3df218733c29c7425604a17de2cebfdd
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs that likely lead to phishing sites or malware downloads. The presence of a 'download button' heuristic further supports the lure-based nature of this document. No scripts were extracted, but the document's structure and embedded URLs strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/strik?utm_term=creative+writing+worksheet+for+grade+4 PDF link annotation
    • https://cdn.sqhk.co/dasisogi/iDQOXDx/road_to_valor_world_war_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/ieex927/new_arabic_ringtones_for_android_mobile.pdfIn PDF document text
    • http://zubosoxi.22web.org/15651976832.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/axEFgho/getty_images_contributor_login.pdfIn PDF document text
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/1591554.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/DZ1hgmy/death_race_killer_car_shooting_game_mod_apk.pdfIn PDF document text
    • http://poxexududojal.66ghz.com/72954131909.pdfIn PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/8e00a.pdfIn PDF document text
    • https://cdn.sqhk.co/xabovalizo/ayRTlIf/jadazukizujidasowala.pdfIn PDF document text
    • https://cdn.sqhk.co/kemomonil/hjjishc/32273410026.pdfIn PDF document text
    • https://cdn.sqhk.co/roduxokixuzi/sjfigjc/park_charlotte_inc.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/8ienigl/978777028.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/ighjlgd/89464081087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wegugus/action_movies_mp4_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/empty_garden_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/informative_article_definition_and_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/crossword_answer_for_use_a_divining_rod.pdfIn PDF document text
    • http://tutivute.epizy.com/pozarimibupolif.pdfIn PDF document text
    • http://tuketusave.rf.gd/fuzuwagemajabif.pdfIn PDF document text
    • http://kagumaxapa.rf.gd/40214491499.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_off0000efa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA8 5348 bytes
SHA-256: 7d50c045f370eae11100e02f39a1b7bfa84f0985d1a37206f711e0880c4bee3a
font_01_sfnt_off000101ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EE 10768 bytes
SHA-256: a63d46e1f3caa4533ff5952ec5feb0a3ee4bb8168f277699e32de29cb03ee081

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