Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa464d1b23d4094…

MALICIOUS

PDF

79.4 KB Created: 2021-03-08 15:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d01e32ae970fd4f650749e7422706de2 SHA-1: 70a02e610f84ffc12cbb86dd62f9a69cc4de8497 SHA-256: bfa464d1b23d4094bfeea6128a68ea737c6169e726c5ead0c154d547ca82c9e5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various PDF files. The primary URL, https://golowaki.ru/123?utm_term=m+p+l+ka+full+form, is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=m+p+l+ka+full+form
    • http://xivoxuvawet.iblogger.org/32080587791.pdf
    • http://nageramuvepom.mywebcommunity.org/57929153527.pdf
    • http://merulabodonulu.iblogger.org/anker_car_charger_manual.pdf
    • http://xumupizaxuto.scienceontheweb.net/is_the_secret_dare_to_dream_on_netflix.pdf
    • http://mojenisijita.mywebcommunity.org/nudupegebu.pdf
    • http://vozivovog.scienceontheweb.net/47879243452.pdf
    • http://jifarobajis.sportsontheweb.net/how_do_i_connect_my_echo_dot_2nd_gen_to_wifi.pdf
    • http://xutexukoxobofi.mywebcommunity.org/historia_universal_jose_rodriguez_arvizu_3ra_edicion_gratis.pdf
    • http://jekefidaz.mygamesonline.org/37382763278.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/fonibinaraj/movies_app_apk_free.pdf
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_e4003f90a9a54fcaba24c6570dd9891e.pdf?index=true
    • https://s3.amazonaws.com/duzexefemosaxe/14848418936.pdf
    • https://uploads.strikinglycdn.com/files/57983323-ace5-4612-9d39-0d9304f0db69/lomod.pdf
    • http://naremijex.epizy.com/zebaninuzobov.pdf
    • https://s3.amazonaws.com/mesotodimus/bosch_gol26_manual.pdf
    • https://uploads.strikinglycdn.com/files/098ea3ae-4ab1-4500-a470-baeb7650cc06/steal_this_book_abbie_hoffman.pdf
    • https://s3.amazonaws.com/paxuvagal/83832456440.pdf
    • https://uploads.strikinglycdn.com/files/0a8e08fa-3602-4ef1-a03b-f16449a43d4f/41153710668.pdf
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_66569d825a8046f79885d0d524277f60.pdf?index=true
    • https://s3.amazonaws.com/fowonaxul/suxaku.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d27d.bin
6c307ba60cadde95073699babde7790cc691d89e3e1f94789bbada93b75d2ca3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27D 3012 bytes
font_01_sfnt_off0000dd42.bin
fd1486719269347470d2f600c7655cfddf1a836ce801f3f08f6f4268cc502e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 4936 bytes
font_02_sfnt_off0000ee03.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 3720 bytes
font_03_sfnt_off0000f966.bin
e1108c514fba11d8390974eac7040f34cb0a82e8e802c1a06527597bd63eebea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 11024 bytes
font_04_sfnt_off00011ef7.bin
fd19794cbfaba612f88783f2187d34718498cfdb040a9d01ba807f1d3af07e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF7 4400 bytes

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