Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac512f9bc02c8a0…

MALICIOUS

PDF

76.8 KB Created: 2021-03-14 01:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad263efffe4b5e2f31e98b65869ff5b1 SHA-1: 373e7b4814181582ee1a520722719fe5a45503aa SHA-256: 6ac512f9bc02c8a06d7df7680be238cd789cc6bce95b7b05595bcc0fb8684faa
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to disposable hosting, and one prominent URL related to an 'Australian visa application form'. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to download and execute a second-stage payload from one of the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=australian+visa+application+form+png+pdf
    • https://cdn-cms.f-static.net/uploads/4408583/normal_602d2422cb115.pdf
    • https://static.s123-cdn-static.com/uploads/4459036/normal_5ff62e1434baf.pdf
    • https://cdn-cms.f-static.net/uploads/4490140/normal_601426c158750.pdf
    • http://ca-management.website/dell_precision_t5500_compatible_ramrt26k.pdf
    • http://megahit.space/tajegasujodifufawukozuvoga6pl.pdf
    • http://gagimubu.mywebcommunity.org/veritas_prep_gmat_practice_test_accuracy.pdf
    • http://dlkmvkoenv.info/kenmore_electric_range_oven_does_not_workxn5cw.pdf
    • http://dakisemakegag.sportsontheweb.net/77345499898.pdf
    • https://cdn.sqhk.co/raxulaxesob/jfqH3yq/shirley_caesar_i_remember_mama_mp4_download.pdf
    • https://fubaxegadajud.weebly.com/uploads/1/3/4/4/134454669/rekad.pdf
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/355411.pdf
    • https://cdn.sqhk.co/pufowuvikij/ptsidms/lineage_2_revolution_forum_tr.pdf
    • https://cdn.sqhk.co/lobinazema/ghggixI/riredubo.pdf
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5ff69f452ea05.pdf
    • https://lovizedisar.weebly.com/uploads/1/3/1/4/131437361/nusababazasisolo.pdf
    • https://cdn.sqhk.co/joziroluxu/hji7ihl/among_us_mod_menu_always_imposter_ios.pdf
    • https://cdn.sqhk.co/zanuvajebodu/ibhbcx8/retro_games_download_for_pc.pdf
    • https://cdn.sqhk.co/fasegibuniz/jejbgjg/85863044957.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pulutugorivexek.atwebpages.com/34467258615.pdf
    • http://luxupuxud.myartsonline.com/2639306496.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_off0000edc2.bin
626190b56d1ec5272eef85fa22d443e19bad7c9f629f1d61d13509d384bc9704		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 5524 bytes
font_01_sfnt_off00010080.bin
dbd5699b864a559157a55c76e61a6bc1bdb6268a3ef9e4f83c2be17b0d233e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10080 10980 bytes

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