Malicious PDF — malware analysis report

Static analysis result for SHA-256 c334c00d0f0dc549…

MALICIOUS

PDF

80.4 KB Created: 2021-03-14 16:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4249eeea40979780239d8c8bc05ed6a5 SHA-1: 538a58de0e7fc0bda83ab9134f9806784cc5ec3d SHA-256: c334c00d0f0dc5497f0c90d8dd88c7b3a200fa4eca24445eabc26687302d236e
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 0.9994

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://dugedepap.ru/award?keyword=comment+regrouper+deux+fichiers+pdf+en+un+seul PDF link annotation
    • https://cdn.sqhk.co/vozevadijut/jfGghit/78674296514.pdfIn PDF document text
    • https://cdn.sqhk.co/melukate/tgjBlr2/online_photo_editor_collage_for_facebook_cover.pdfIn PDF document text
    • http://pitukegurajokup.22web.org/roviperetaparugeb.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/QDPgjaD/omega_street_fighter_4_tier_list.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/jggyPhh/tanks-_a-_lot_dive_charters_clearwater_fl.pdfIn PDF document text
    • https://cdn.sqhk.co/ninulekuto/hfwIFjc/best_camera_for_live_streaming_church_2020.pdfIn PDF document text
    • http://tuworiki.22web.org/763159953.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/thaehgl/register_irancell_sim_card.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/xujgjbR/novenewuxudekaxiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwavese.rf.gd/5906376020.pdfIn PDF document text
    • http://weketabafizevu.epizy.com/lagu_aetherian_the_rain.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/alpine_halo9_installation_manual.pdfIn PDF document text
    • http://vifijugi.epizy.com/4_pics_1_word_answers_7_letters_game.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/the_compleat_distiller.pdfIn PDF document text
    • http://watokugen.epizy.com/akiva_daughter_of_smoke_and_bone_fanart.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/psalm_23_niv_bible_gateway.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/41781717872.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/wipepesuridisuziwegin.pdfIn PDF document text
    • http://witegev.epizy.com/eat_well_for_less_book_2019_asda.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/what_happened_to_monday_imdb_parents_guide.pdfIn PDF document text
    • http://vumupekosevi.rf.gd/business_ideas_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/sizoxibaxexuji.pdfIn PDF document text
    • http://roxadib.epizy.com/78668255993.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_off0000fab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB5 5332 bytes
SHA-256: f1b9335f8edc8dfa6def386ba38d9aa2674cb2c1d7d72b36eafe86db51e89b56
font_01_sfnt_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 11940 bytes
SHA-256: 53212f1ae06888610b5dcbfb6b56ff3e849624f1489356f4fba34092659b1049

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