Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60bedd4b3d15ebe…

MALICIOUS

PDF

73.1 KB Created: 2021-04-06 13:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1ba993c7e6835398778314189b541838 SHA-1: 28a1aa0282390c264842f2b66ff71f6be98f57d4 SHA-256: f60bedd4b3d15ebeb3ab985c89e299855ee14455d5a18136512ccf3cfd25a2d9
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggests a phishing or link-farming scheme. The document body, though heavily obfuscated, contains metadata related to its creation, further supporting its nature as a potentially malicious artifact.

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://pelibifir.ru/strik?utm_term=arris+surfboard+sb6141+lights+meaning PDF link annotation
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/4473670.pdfIn PDF document text
    • http://italywow.info/pujetopifilomutabinujodafsdxqb.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/buzut.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/colloquial_arabic_egypt.pdfIn PDF document text
    • https://cdn.sqhk.co/gasukatebu/jbGhihi/f1_kubica_arm.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/Dijgijd/musoleli.pdfIn PDF document text
    • http://zulesaxeririv.sportsontheweb.net/the_synthesis_and_characterization_of_inorganic_compounds_jolly.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/anorexia_nervosa_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/iigjfhb/infinity_song_mad_love_video.pdfIn PDF document text
    • https://juvosibizojeguw.weebly.com/uploads/1/3/4/0/134040958/girubuzowakaxinaje.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/kino_cinemax_nitra_program.pdfIn PDF document text
    • https://cdn.sqhk.co/lewewita/m8ruyzB/gebaxesipupadepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_60512012a163d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495558/normal_5fee9af46e83d.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/EhfGggW/retukosezevadop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_605442f91eab4.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/8475648.pdfIn PDF document text
    • http://usblighter24.site/mapokomezozidunhnqq0.pdfIn PDF document text
    • https://witudaki.weebly.com/uploads/1/3/4/3/134332653/bde39e738a7.pdfIn PDF document text
    • https://nulesurusisozi.weebly.com/uploads/1/3/4/7/134744420/8dc805f21cbd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kufazete/how_to_be_a_cashier_at_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/jujinofut.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/modern_control_engineering_4th_edition_by_katsuhiko_ogata_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/ceconite_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/bufidekal.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_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 5744 bytes
SHA-256: 5c1567b5e3b553ddd02a94bb0aa5ac8950166fba3c7e6c1a8aabce80933d6874
font_01_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 10904 bytes
SHA-256: 32ced505078a6f19ba6e831ae6050f845974c32bb7fbe4d1ca2455c8275c1e3f

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