Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fabb426db37b8b2…

MALICIOUS

PDF

75.6 KB Created: 2021-06-10 01:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 927f761c15f289a4f4373f0ec7c87102 SHA-1: ceff460396e64d5ea4956f4c650cb4a85781fe57 SHA-256: 5fabb426db37b8b2c0d18cc7f86ae4df2f558aec3bb39868e4684e8cf31769be
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, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'archism.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'play online subway surfers game free', suggesting a lure to attract users to the malicious URL.

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://archism.ru/pbw?utm_term=play+online+subway+surfers+game+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446942/normal_605129c0213fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388046/normal_5ff281506612a.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/4852f396-9e05-4e4f-96bb-35d0f1a0bc52/94330507205.pdfIn PDF document text
    • http://bajaduxaxusi.pbworks.com/f/ronizulonoxiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f99142-54c6-47e0-9979-778f06cb8cd0/list_of_persuasive_essay_topics_for_high_school_students.pdfIn PDF document text
    • http://binovilijire.pbworks.com/w/file/fetch/144997254/lafekipupoperodoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a49d173-77ea-4aa7-aa82-00f076f646a5/motuvesul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aeb953f-2f6e-47e7-b43f-d3d7b805ac34/829599195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c04f1b86-c00c-4213-ad18-3268429f546a/77818015967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f2da28-7ac2-454b-827e-0c212fe3fbd2/18890935729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92bc725-5906-413b-a8b1-a319b4a4fc9a/56335995433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2439f2d0-5403-4830-a98b-bce8a87ad122/7573104957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a534384-0d5b-4aa6-b4c7-f9c6f899cdba/xaganix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4a4b3a-b17b-4910-a309-60100cf729ab/90882992655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5f677ea-d058-4ef8-81f9-1c6aeee8961a/what_does_chinese_character_ren_mean.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/how_to_chromecast_pictures_to_tv_from_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915418cd-af18-4ec4-b74b-83743b7ade62/scope_of_work_social_media_marketing_template.pdfIn PDF document text
    • http://lenivuzuk.pbworks.com/f/papas_sushiria_hd_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e61b6b-13b6-4505-a095-a536213460db/4105447969.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_off0000ea7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 5424 bytes
SHA-256: 209b3b7ee5cb0c9912fbd0f003eab079acb1228bc22d7fed3579d3867de89385
font_01_sfnt_off0000fcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF7 10668 bytes
SHA-256: f52bb1c9beb5593c7b3080ed3b79b02a967859062cca84db77875dd80bdca50d

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