Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe89fc7e2bd8867a…

MALICIOUS

PDF

82.4 KB Created: 2021-04-09 17:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 490c13e84507ec30fc6a73fb69263a3c SHA-1: 87544c68095d78894f5bb020ad6d6ae91f5948bf SHA-256: fe89fc7e2bd8867a1313544dae9f4784f29aecc9edacc743d661e237ec1aa52b
96 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating external URI usage and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document body, though partially corrupted, suggests a lure related to vaccine side effects, directing users to the URL https://jumiwimov.ru/strik. This URL is likely part of a phishing campaign to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=como+aliviar+el+dolor+del+brazo+despues+de+una+vacuna PDF link annotation
    • https://cdn.sqhk.co/jivaduzar/XjkT640/sodotev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369166/normal_5feede9782075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_606d128f7e101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_605b07b9640f8.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/geiazjh/reiss_marko_suede_cafe_racer_jacket.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/vitonememominazot.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/duel_links_reddit_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/622557ca-a9b8-401a-a667-78dd25e5443e/nifobim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046e6fcb-cd7d-4186-93da-f3e7e9a7b4ee/how_to_get_a_job_as_a_mechanic.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/jewarelefalomugijosujogi.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/bully_anniversary_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/11656920007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7dcb6a-8e66-4553-a115-c6e6f1c50288/how_many_pages_in_the_shining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d82f8dc-3b55-4c4e-abcf-b7e488b272b8/par_quoi_remplacer_la_maizena_dans_une_sauce.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/click_clack_moo_guided_reading_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ca44c3-e4b9-4721-b014-e09941fbe0fe/vikal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5446c36-6545-4a1c-a540-a9f70f911b8a/psychology_ciccarelli__white_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54898da-5163-4fc2-a57b-2c049a871f14/plato_symposium_penguin_classics.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/soresowaxerulofoniti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9805f5-2bb7-476b-8609-411d7964e045/2733776825.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_off00010098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10098 5376 bytes
SHA-256: cbb972f578f0d9040939875aa7575f8317a4da2fbbc844e35a5d7e191f9a1026
font_01_sfnt_off000112cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CC 11988 bytes
SHA-256: ec614961e293772c8d68b69ad08af5a44ecd86bab902e02783cfdd8c688bc0ef

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