Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d4b6f49870f1ea…

MALICIOUS

PDF

78.7 KB Created: 2021-02-14 07:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 532bd3cfdaae6589c77d2712178ff792 SHA-1: 6d71771e5c014538ccb9b565fd72e850313b8b41 SHA-256: e6d4b6f49870f1ea3cb18260d0e2cc869efe0f5433b6eacf6edf11b665655e24
186 Risk Score

Malware Insights

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

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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/123?utm_term=spectrafire+electric+fireplace+insert+manual PDF link annotation
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/fanugowobenuv-tarabutoxizo-feros.pdfIn PDF document text
    • http://rowaxuxot.22web.org/psychology_books_in_amharic.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/gtX0QNG/frozen_ice_cream_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/EgIihec/encyclopedia_brown_movie_cast.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/mawonim.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/sorepitebixeju-komuwudebo-xametujadubise.pdfIn PDF document text
    • https://gefizubumob.weebly.com/uploads/1/3/4/4/134473977/lepizinobesati.pdfIn PDF document text
    • https://pijefezumiw.weebly.com/uploads/1/3/1/3/131379255/3a5cb5730d186e.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/59175823263.pdfIn PDF document text
    • http://vodaxuf.iblogger.org/company_of_heroes_free_pc_game.pdfIn PDF document text
    • https://nefakemibozike.weebly.com/uploads/1/3/5/3/135314079/5000430.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/njijchb/3765021299.pdfIn PDF document text
    • https://numuladak.weebly.com/uploads/1/3/4/6/134613837/vetajud_boserise.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/6S2hd9w/2_player_3d_racing_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/DsHhh3V/optical_illusion_hypnosis.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
    • http://migisopipa.epizy.com/amman_god_tamil_songs_masstamilan.pdfIn PDF document text
    • http://biwexasen.rf.gd/davokesowupinoxa.pdfIn PDF document text
    • http://sowabufiki.rf.gd/63478284538.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/kibler_quest_mage_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/bilcare_fd_application_form.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/eclipse_ide_32_bit_filehippo.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_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 5036 bytes
SHA-256: 4e6d1b875de547f0292eb683c6ab9394cb73af7d222dd552c032f826e203cd68
font_01_sfnt_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 10692 bytes
SHA-256: 62b816ad61774321bbde77a11fb40ad6f9e10e58aa3f6e7ee5a7194cfa9aeee5
font_02_sfnt_off00011efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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