Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c354ba112d5e69…

MALICIOUS

PDF

95.9 KB Created: 2021-04-04 23:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09ab8ad15a73eba7e17389a2e6306d9b SHA-1: 69619b605f348f8214d7234d468addefa5c33272 SHA-256: 24c354ba112d5e6933c00c98b6bd247e16df289e51c6f3ac62710b60bb71eee2
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to Martin Luther's theses, directing the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or redirection attempt, likely leveraging PDF vulnerabilities or embedded JavaScript to achieve its goal.

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://dafemum.ru/strik?utm_term=95+tesis+de+martin+lutero+mas+importantes
    • https://cdn-cms.f-static.net/uploads/4407331/normal_604d2d4ad7734.pdf
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/1774191.pdf
    • https://cdn.sqhk.co/tekunipifob/gi2fchu/72925895717.pdf
    • https://wilubowedawiwo.weebly.com/uploads/1/3/4/5/134528918/kesorovo.pdf
    • https://xakolino.weebly.com/uploads/1/3/1/4/131453712/fobiwaketujim.pdf
    • https://static.s123-cdn-static.com/uploads/4412158/normal_5ff080f583f1c.pdf
    • https://cdn.sqhk.co/parapirer/cghihgf/42747107922.pdf
    • https://cdn-cms.f-static.net/uploads/4453344/normal_5fd128d1e720b.pdf
    • https://cdn.sqhk.co/raxoxawupej/jeZjjjf/23722773947.pdf
    • http://optalpha.com/allah_allah_video_hd_songb7bz7.pdf
    • http://pofuxubilet.sportsontheweb.net/gifixesurowemuku.pdf
    • http://dusanaputojinon.mygamesonline.org/95397447146.pdf
    • http://bachanalytics.com/60083642889n5jte.pdf
    • http://istlan.space/toshiba_satellite_l755_battery_replacementbqd6g.pdf
    • http://yarrebitteh.online/how_to_overcome_depression_at_universityp5dsh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jokubamobivavum.onlinewebshop.net/32216127151.pdf
    • https://uploads.strikinglycdn.com/files/b2fbfd7a-51d4-415b-b3f1-74ea9fa83502/how_to_clean_antique_clock_movement.pdf
    • http://ritumogadoj.onlinewebshop.net/zukujirakexejaj.pdf
    • https://uploads.strikinglycdn.com/files/825cd60b-715c-458d-95d7-5a81237daa05/74986346197.pdf
    • http://widepidaba.atwebpages.com/31904556817.pdf
    • https://uploads.strikinglycdn.com/files/0236cb85-ebff-41b5-b83c-1bc9699d996b/how_do_i_reset_my_midea_air_conditioner.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_off000136d4.bin
8977b2c37700b736f48e2fd61aff86ea27f1c73613b8a9f0c788ecc52b3e93e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x136D4 5292 bytes
font_01_sfnt_off000148b4.bin
1345dbe444f3365d520724e00e14328c114756ae6ecf3940836f6e0ebe9a9c6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x148B4 12120 bytes