Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c690d71abaf10c4…

MALICIOUS

PDF

79.0 KB Created: 2021-04-01 03:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb68da4181504f289cb3449b24bb0855 SHA-1: 110505821ccbfae1f70b51d11b6fe83600d6b582 SHA-256: 8c690d71abaf10c4d2ec04c8a34c7f40203850ec84c0df18ec2f93df4902066c
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of an external URI pointing to 'xezojetit.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate it's designed to trick users into visiting malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=salary+survey+internal+audit
    • http://golomashvanna.xyz/723504128239ws9u.pdf
    • http://comp-arenda.site/boyhood_movies_spdftp.pdf
    • http://gatorama.space/redirajs3y8a.pdf
    • https://cdn-cms.f-static.net/uploads/4368748/normal_6054fb2bd9c1c.pdf
    • http://fruittea.space/singing_in_the_rain_gift_ideasgmyeq.pdf
    • http://supobesopo.mygamesonline.org/pdf_biomagnetismo_cuantico.pdf
    • http://sufulilutidake.mypressonline.com/22118716837.pdf
    • http://firstflirts.site/58930460783scfrb.pdf
    • http://walkover.me/tezifamuv6wuw.pdf
    • http://amaryllis.space/timulutexonua7v90.pdf
    • https://cdn-cms.f-static.net/uploads/4475988/normal_601ed1de89da4.pdf
    • https://static.s123-cdn-static.com/uploads/4421224/normal_5ff3f169b5f13.pdf
    • https://cdn-cms.f-static.net/uploads/4471479/normal_603922923e0dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/bc9245e0-b056-4b5c-a21c-2f5866d23ba4/destined_to_reign.pdf
    • https://uploads.strikinglycdn.com/files/d9ca8e3b-51de-412a-86b4-69641df291b2/goat_simulator_multiplayer_switch.pdf
    • https://uploads.strikinglycdn.com/files/b3607bcd-5388-46bb-9e07-96a662b34062/batufogojuxomodevuzu.pdf
    • https://uploads.strikinglycdn.com/files/1a3702e2-4764-499f-9eef-2f7c1dc02010/14845726140.pdf
    • https://uploads.strikinglycdn.com/files/13f887d2-a642-450c-9518-727b5b368fcd/how_to_add_index.html_to_wix.pdf
    • https://uploads.strikinglycdn.com/files/689c2e67-790e-4853-ac5f-797cb8fd1bdb/blackburn_trakstand_ultra_bike_trainer.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_off0000ecc2.bin
f405c4b3823863bb0de0317d3ac54dcf1607979a744537a860e67533625c524a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC2 4856 bytes
font_01_sfnt_off0000fd47.bin
e363d5388e0f08148767756aa2448fce425d35b17c6d3c5a3702df9a9766b032		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 10264 bytes
font_02_sfnt_off00012072.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12072 4324 bytes

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