Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7474e9f5556061…

MALICIOUS

PDF

74.9 KB Created: 2021-03-21 02:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c2d24ba5482165f61e8fb382c7ff03c SHA-1: 25de4f4db099890bc50e5febd1879a1ed2e8cafc SHA-256: 4f7474e9f5556061317fa7b1cb1d08522682f43b5cc2602f3987beb86d2cacd6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or SEO spamming technique. One of the primary URLs identified is https://botokaw.ru/aws?utm_term=whirlpool+gold+oven+door+removal, which is likely used to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/aws?utm_term=whirlpool+gold+oven+door+removal
    • http://uorott.com/jenuwobefafawuzewasokheybb.pdf
    • http://hookup154.online/free_intro_template_after_effectjs6uz.pdf
    • http://makeyourself.xyz/zinezeroluzuxezizerkcc4.pdf
    • http://mopexaxurip.getenjoyment.net/baby_goat_yoga_orlando.pdf
    • http://espaceabonne.com/mezejiwaxefivunoxoweguzemtomcb.pdf
    • http://goodxday.xyz/detitasufoahd5w.pdf
    • http://nitapida.mywebcommunity.org/pretty_little_liars_season_1_trailer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_5d8ed464751a4322a15258bd3a1f3aa4.pdf?index=true
    • http://beliraguw.onlinewebshop.net/arduino_programming_language.pdf
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_d40b13e90e764e8885250b17b3ce8a90.pdf?index=true
    • https://s3.amazonaws.com/bejeseja/libros_de_fisica_1_para_bachillerato.pdf
    • https://s3.amazonaws.com/fujadabez/russian_revolution_worksheet_answers.pdf
    • https://s3.amazonaws.com/wozowuledij/birizumonivugeredibi.pdf
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_9db12f7a54b44f4aacade1f83fb30613.pdf?index=true
    • https://s3.amazonaws.com/bisapovepizaj/bank_accountant_job_in_karachi.pdf
    • https://s3.amazonaws.com/turip/bowmasters_game_for_pc.pdf
    • http://supuwevul.atwebpages.com/garmin_echomap_plus_94sv_livescope_bundle.pdf
    • https://s3.amazonaws.com/bomupi/69_camaro_service_manual.pdf
    • http://pekowob.onlinewebshop.net/written_advertisement_examples.pdf
    • https://s3.amazonaws.com/muvemasoxaji/22716179004.pdf
    • https://s3.amazonaws.com/padanivozeb/68599350854.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbdf.bin
b743064bc0455afd68b83fd2a946c4ccc4f29d69c38df0df0fb16587da0afb9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDF 4976 bytes
font_01_sfnt_off0000ec96.bin
e4b3eea4459b2fcb7442530ac641201ca1268bdc06ed1a77dc8bbe863ec708c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 10328 bytes
font_02_sfnt_off0001100a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 4324 bytes

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