Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10044bb712669cb…

MALICIOUS

PDF

82.0 KB Created: 2021-05-20 23:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbbece882de78516981c3127b6bcb8f7 SHA-1: a65b166e28680e13c325179ae3f959f86479f0de SHA-256: c10044bb712669cbf09655477c88bb20b2078833476268640506482b8ef6d849
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, indicative of a link farm or SEO manipulation tactic. The primary external URI points to 'https://zajinet.ru/strik?utm_term=the+clear+quran+with+arabic+text+pdf', suggesting a lure to a malicious or spam website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=the+clear+quran+with+arabic+text+pdf
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/472601169d5778.pdf
    • https://sebeguresed.weebly.com/uploads/1/3/5/9/135966133/zipofuse.pdf
    • https://nurixuwabojud.weebly.com/uploads/1/3/4/5/134587723/c3e5b0148b.pdf
    • https://static.s123-cdn-static.com/uploads/4452608/normal_5ff090242251e.pdf
    • https://guzesunidami.weebly.com/uploads/1/3/0/8/130873942/moviniva_rofij_loponozu_tijibutudamu.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_603a739deb760.pdf
    • https://static.s123-cdn-static.com/uploads/4487927/normal_600658817b32d.pdf
    • https://cdn-cms.f-static.net/uploads/4375087/normal_60137f381c9f0.pdf
    • https://cdn-cms.f-static.net/uploads/4499999/normal_6044f72bca6f1.pdf
    • https://cdn-cms.f-static.net/uploads/4477373/normal_60496ddba1328.pdf
    • https://cdn-cms.f-static.net/uploads/4452373/normal_6024211baed66.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7eab9756-cdfb-4630-93de-b13570e443ef/54490307910.pdf
    • https://uploads.strikinglycdn.com/files/a483ed22-23c7-4848-8bcd-a5d70689fcb1/fapod.pdf
    • https://uploads.strikinglycdn.com/files/bcdc7aa1-aef7-4442-9b71-da2474761aaa/how_to_replace_battery_on_kindle_d00901.pdf
    • https://s3.amazonaws.com/vapite/why_is_my_cox_modem_blinking_orange.pdf
    • https://s3.amazonaws.com/punagilelabon/54873276931.pdf
    • https://uploads.strikinglycdn.com/files/7a7e798c-f918-4d87-9551-8e7f095bbf1f/28669946674.pdf
    • https://uploads.strikinglycdn.com/files/9c614ee8-9183-4038-882a-156c33e07465/how_to_connect_an_onn_wireless_mouse.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e619.bin
36a46d8ff0487527a6dc0a7be2cb48fdd7aa5031cf8c0e2636f84bf93e0230d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE619 5440 bytes
font_01_sfnt_off0000f8a7.bin
6caecb8f0a2551006a0d8b1a8be31368340d994cf5e9322b5b7fb8391ceeb85e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A7 11616 bytes
font_02_sfnt_off00011f45.bin
956dd61f8f3d3853c781af4009b396974e1ae196b71be16fd5d06239a34ab247		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F45 17976 bytes

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