Malicious PDF — malware analysis report

Static analysis result for SHA-256 06338e593779b92a…

MALICIOUS

PDF

75.2 KB Created: 2021-03-23 10:07:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a93a59bb87b71f107b90664e8bacdd2 SHA-1: 1085e52cdf60fab1e679e43f0d74e8e778823fba SHA-256: 06338e593779b92a9e13ce8ca9d06b3b0fa662e286da6237bd22126c89647810
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs and embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination. No scripts were extracted, but the overall structure and URL analysis point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/strik?utm_term=how+to+draw+cool+stuff+pdf+free
    • http://gubixazolela.sportsontheweb.net/how_to_measure_the_chainsaw_bar_length.pdf
    • http://jogajep.medianewsonline.com/kiligelofika.pdf
    • http://tijudozi.scienceontheweb.net/how_do_you_setup_a_saltwater_tank_for_beginners.pdf
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/4317712.pdf
    • http://baderezu.scienceontheweb.net/73806637608.pdf
    • http://vosajizegek.mypressonline.com/apush_amsco_book.pdf
    • http://tufuwavaziga.mygamesonline.org/joy_luck_club_book_club_discussion_questions.pdf
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/gusubuveko-ruzixaluzeji-nakolevubewoves-fuveridovidikaj.pdf
    • https://static.s123-cdn-static.com/uploads/4420745/normal_5fed10640dac6.pdf
    • https://merasata.weebly.com/uploads/1/3/1/3/131378960/pejodaj.pdf
    • https://cdn-cms.f-static.net/uploads/4426090/normal_60445bac78bd5.pdf
    • https://cdn-cms.f-static.net/uploads/4447265/normal_601322c5047dd.pdf
    • http://ranupila.mywebcommunity.org/18760671723.pdf
    • https://jusegopij.weebly.com/uploads/1/3/4/4/134480833/vikuxomupuze_dineviko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lopeteb/what_is_the_pragmatic_theory_of_truth.pdf
    • https://s3.amazonaws.com/wutisigila/business_ethics_and_social_responsibility_notes.pdf
    • http://wuxodevidupibe.epizy.com/best_panasonic_cordless_phone_without_answering_machine.pdf
    • http://jekutekovemimav.rf.gd/nivatofuvukemori.pdf
    • http://pixafur.atwebpages.com/starbucks_availability_form_canada.pdf
    • https://s3.amazonaws.com/ladojenefe/kawuwixoruzi.pdf
    • https://s3.amazonaws.com/tuzamada/sample_construction_cost_estimate_template.pdf
    • http://jolavewavesuj.epizy.com/isaac_item_cheat_sheet_afterbirth.pdf
    • http://zoxumatodemake.rf.gd/best_brand_identity_design.pdf
    • https://s3.amazonaws.com/gogunabones/sexugovulafubonejabepomif.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea25.bin
27b4f63bbee9f60200b2cdace19627b214bb0cd95f59dc751d482d4341f80fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 5200 bytes
font_01_sfnt_off0000fbf8.bin
04c1d8e31a33620eac65d98532268e1eaf9112325ce72ea72da4c227f0dbf32c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 10232 bytes

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