Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4aa1f90333003f…

MALICIOUS

PDF

81.3 KB Created: 2021-01-08 09:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ab244bb7ed0ca86be93bd6eb96e33e79 SHA-1: 72c3c97f361bbbc4fe2f39e3934a990592e920ec SHA-256: 0c4aa1f90333003f0988540719511e8ec905eccf7e8204f6231bcde3d9405d62
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://traffnew.ru/aws?utm_term=friday+the+13th+jason+x+parents+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5fb4155f54e85.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/Xhcm619/casino_card_game_faro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/046f9f92-c2bd-4084-a1a8-f5ce1fd7dd2b/fl_studio_mobile_hd_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc830775-5544-4237-8356-69a33344b63c/florida_association_of_science_teachers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b865d9-a50c-40ef-8d43-792c5bcfe768/menosuroxaxixali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d176f9-5c9e-4e15-9e64-26c9391a9371/67766731335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd60d767-f284-4d5f-a532-5e478459885a/hp_laserjet_100_color_mfp_m175nw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d5901c-4eda-4c88-86c4-f9c92f9b8d56/download_game_race_kings_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23506341-b0c9-459a-b0a6-c7a3022205ee/tikikaduvanakoxurore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e09b488a-eb94-4151-bdc1-0c9c1c329534/wevojeponujatokuzenob.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/drawing_ellipses_in_perspective_with_guides.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 5608 bytes
SHA-256: 2d0208c752ec115a6147aabd1ee343c7df82c857956e5f65749c35dee3122c2c
font_01_sfnt_off00011283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11283 11328 bytes
SHA-256: bcdb54adf13401720164908d07541aa5bbfa6b4b233b6f2274f037a8994891f5