Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f8e12ac15627f4…

MALICIOUS

PDF

72.0 KB Created: 2021-03-30 16:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32810bbc7fdfb543f51c81fdce9ad76e SHA-1: 540311cf307e6d8900f9c3c410ff8d0246ca521a SHA-256: 50f8e12ac15627f4da75915464392738fae937eb45f68b2c35acbf1bc9af1f2e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=feliz+navidad+chords+key+of+c
    • https://cdn.sqhk.co/pegipoveridi/amjcUFc/31733388977.pdf
    • http://priz24.site/rapobak2pymv.pdf
    • http://drive4mclanemilwaukee.com/katazevezowetolafabuvun09mea.pdf
    • https://cdn.sqhk.co/jesotipo/Ohehj4S/tornado_watch_rochester_ny.pdf
    • https://cdn.sqhk.co/zagakobafot/igdjkjb/hot_rod_garage_crown_hick_supercharger.pdf
    • https://cdn.sqhk.co/miloxuso/hjihdzo/gofozewowimupot.pdf
    • https://cdn.sqhk.co/kunagukojoxu/hd2hhjd/90904923264.pdf
    • http://garantiya62.ru/what_psat_score_is_national_merit_class_of_202135r7e.pdf
    • https://cdn-cms.f-static.net/uploads/4391605/normal_601b42bd9ac6f.pdf
    • https://cdn-cms.f-static.net/uploads/4495841/normal_6035d36de971d.pdf
    • http://rmk4sale.xyz/76188893598ixt9s.pdf
    • http://subfamjtii.site/57220826048fer8b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/52920b67-0c44-4842-b866-dba766a7e89b/developmentally_appropriate_practice_focus_on_infants_and_toddlers.pdf
    • https://s3.amazonaws.com/lazesej/what_is_the_science_behind_cooking.pdf
    • https://uploads.strikinglycdn.com/files/59e615e2-4be5-4997-9005-5f4b7e46c8a6/nadasuru.pdf
    • https://s3.amazonaws.com/juzowilipi/dosogafepojekawuga.pdf
    • https://s3.amazonaws.com/kafises/xajutubebubugipuz.pdf
    • https://uploads.strikinglycdn.com/files/53f3280a-c8cb-49ee-ba98-d96965af9bb3/disney_cast_member_holiday_discount_2020.pdf
    • https://uploads.strikinglycdn.com/files/23f8f87a-7914-4aa2-ba61-9921693e1108/introduction_to_statistical_learning_reddit.pdf
    • https://s3.amazonaws.com/tokit/edgerouter_x_setup_guide.pdf
    • https://uploads.strikinglycdn.com/files/faf17461-02ec-4d41-a22e-37b19d08a91d/butexozaru.pdf
    • https://s3.amazonaws.com/dakebesuvum/como_fazer_o_no_em_gravata.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e5.bin
407d364290ca5109568f3a682152920d6475b6f72ff574c8ff76b9c49e3bec4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E5 5340 bytes
font_01_sfnt_off0000ec23.bin
907b7631cb7ffa21f650bd99f2dbb808d81c0fb90c5bf74738f78ebd5337f06f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 10936 bytes