Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c95baeb08f5c3f…

MALICIOUS

PDF

81.9 KB Created: 2021-03-22 21:27:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 34dd3b48c446c624c9c851287351c896 SHA-1: 20901d7ac1fb2632bc7b2863148d6800a08d8cbe SHA-256: e2c95baeb08f5c3f2b3bad7639afb5a09ab8fca6c68bd9e57efd5152525088e5
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://jumiwimov.ru/123?utm_term=azure+sql+server+management+studio PDF link annotation
    • https://cdn.sqhk.co/ruxuvedije/icjgBYN/sudakijekefibijunuzegiriv.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/geWgdif/58372288264.pdfIn PDF document text
    • http://vapawuruvoxo.22web.org/english_grammar_test_b1.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/famumiwiduvudaxufor.pdfIn PDF document text
    • http://kimuzufar.22web.org/84109389377.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/jbjjaje/download_game_fruit_bomb_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/edNjiGD/wanufalezopalaje.pdfIn PDF document text
    • http://guromufupadaf.iblogger.org/cours_sur_l_argumentation.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CFgdiND/wobokosomapodotiw.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/bihar_police_si_syllabus_2020.pdfIn PDF document text
    • http://wowezixuxaxu.22web.org/schengen_visa_application_form_in_ms_word.pdfIn PDF document text
    • http://difijeso.iblogger.org/notizajiwidakufapi.pdfIn PDF document text
    • https://cdn.sqhk.co/xodawakadude/fibpjfd/91395882419.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/21473588677.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/XQieXSa/srs_surgery_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sinojerazofot.rf.gd/samsung_nx300_price_philippines.pdfIn PDF document text
    • http://sojisij.epizy.com/vebaretawakan.pdfIn PDF document text
    • http://baledur.epizy.com/chunking_information_examples.pdfIn PDF document text
    • http://zodumuf.rf.gd/sumexoxab.pdfIn PDF document text
    • http://rivadejupogutun.epizy.com/mewalukojomexepipevuvu.pdfIn PDF document text
    • http://lozisuvuxinosog.epizy.com/kitchenaid_5-quart_artisan_tilt-head_stand_mixer_ocean_drive.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_off0000ff70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF70 5372 bytes
SHA-256: 270454fa8704963379c3845774cc56d8633d316f05189499acb1adf5af87e090
font_01_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 11284 bytes
SHA-256: 0c33abec12e1694107512455c03bf06c872df4aa1e8f320c875f1a32e0b98b50

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