Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae20dc17905f3597…

MALICIOUS

PDF

81.3 KB Created: 2021-03-25 01:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: df16b2a4dd29e592dfe2e5e9cb1a7bac SHA-1: 3d57fd3ea13916473a059c7546697092df2268f9 SHA-256: ae20dc17905f35970539ca7422bdaec50427e6ccd1e6ee18ff96b950a2cc3416
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one pointing to 'lozipotod.ru' which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of external URIs indicates an attempt to redirect the user to potentially harmful content.

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://lozipotod.ru/award?keyword=mac+preview+fillable+pdf+font+size PDF link annotation
    • http://mitisavad.getenjoyment.net/94092861283.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/akrhd8G/car_parts_advisor_apprenticeship.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/eKgepej/spin_tops_mod_apk_unlimited_exp.pdfIn PDF document text
    • http://wufusekej.iblogger.org/18286815287.pdfIn PDF document text
    • http://plusstore.pro/pejizipijitavukrmhff.pdfIn PDF document text
    • http://suzolovopu.iblogger.org/the_devil_wears_prada_full_movie_online_123movies.pdfIn PDF document text
    • http://belkwigs.com/17854309551u5orz.pdfIn PDF document text
    • http://medolufinumul.sportsontheweb.net/ketadadabej.pdfIn PDF document text
    • http://dagulofevururuk.22web.org/misplaced_and_dangling_modifier_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/gdhpYhj/38292124023.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/digestion_de_las_proteinas.pdfIn PDF document text
    • http://wanididezaj.getenjoyment.net/actinomicosis_cervicofacial.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/fjgiidW/miragine_war_unblocked_full_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/gihwUM8/guns_mod_for_minecraft_pe_ios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugukokoner.myartsonline.com/what_does_e3_mean_on_my_duraflame_heater.pdfIn PDF document text
    • http://tofixadik.rf.gd/bittencourt_penal_especial.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_e9c46de376c9475a8a2d09eaa0eb4bb2.pdf?index=trueIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_e9bd10fadde6454f89a94c3ba1973ee0.pdf?index=trueIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_312bd2065855444082865c56302f48f1.pdf?index=trueIn PDF document text
    • http://xuduxabizova.epizy.com/better_half_of_me_tom_walker.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011a30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11A30 18784 bytes
SHA-256: 546e974be042d026445e076182103b8c3a35e54f000b2c56bb0d751af37deecb
font_00_sfnt_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 5496 bytes
SHA-256: 8e93fe879e2499dbf774db4bc66825fb4330aa4a7aa239a4304fee9473e7bad1
font_01_sfnt_off0000f470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF470 11024 bytes
SHA-256: 1878f47aae0938971ef81ad7d9a0b041daa5409ca4f890508a12d561cfe84ebd

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