Malicious PDF — malware analysis report

Static analysis result for SHA-256 6750e5bfdad2269c…

MALICIOUS

PDF

77.1 KB Created: 2021-03-12 06:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c89baea479b68981ae536ab74e02bad SHA-1: cb530e23cd561a591b9f8cf168a3b64b6c2901f4 SHA-256: 6750e5bfdad2269c58832494024a51abf5873c37ee8636739a13d25e28b18cd0
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a high concentration of them pointing to disposable domains and employing UTM parameters, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of external URIs and the structure of the PDF suggest it is used to drive traffic to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=lord+of+chaos+pelicula+completa+espa%25C3%25B1ol+gratis PDF link annotation
    • http://ganoget.scienceontheweb.net/newobetix.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/idjfajc/avakin_3d_avatar_creator_apk.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/wekobatodarorom-babawuvimam-wizomatitu.pdfIn PDF document text
    • http://citimart.online/carpentry_and_joinery_volume_4zdj2g.pdfIn PDF document text
    • https://rogifegupoxixo.weebly.com/uploads/1/3/4/0/134040774/c767f8792.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/15875890787.pdfIn PDF document text
    • http://raicen.com/lajerubisumukoxufiwariwu4ra3f.pdfIn PDF document text
    • http://apelsins.space/652028213094tiq0.pdfIn PDF document text
    • https://sunutefe.weebly.com/uploads/1/3/5/3/135350425/4937299.pdfIn PDF document text
    • http://takojebuti.iblogger.org/biret.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/41hbric/facebook_search_people_s_posts_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/EbhgFhi/popotupukakokud.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/ghcgfja/make_a_cake_cooking_games.pdfIn PDF document text
    • https://vekeliludodim.weebly.com/uploads/1/3/4/7/134745250/rusofifuduxumodum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipawas.epizy.com/what_is_the_best_rig_for_flounder.pdfIn PDF document text
    • http://tifafepomuko.epizy.com/hicksville_water_district_water_quality_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/ben_10_cartoon_tamil_full_movie.pdfIn PDF document text
    • http://petifogowiga.epizy.com/ascii_table_extended.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/tufodorirejulomuwatajum.pdfIn PDF document text
    • http://vaxinot.epizy.com/chi_ionic_hair_color_conditioner.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_off0000ea93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA93 5724 bytes
SHA-256: 7270c9c2b8d3c8666ea4e3c4b33ecb34623279181519c2c5aba09aa011406a58
font_01_sfnt_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 11740 bytes
SHA-256: b00a1588da181740e7d998067ceba2f4a434b346647708d0d4d075b282246d8a

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