Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f193fb0b0b42f80…

MALICIOUS

PDF

83.5 KB Created: 2021-03-22 20:18:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6417b65a66bd235a42791ca81515381 SHA-1: 9b29d5dd4f0f2382bf56307c20ce1173d29f061c SHA-256: 7f193fb0b0b42f805895c56fb9f2235b58d94a6a633e4fdc65d62221990b0194
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that appears to be a lure for downloading a malicious PDF disguised as HR interview questions. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of external URIs suggests the document is designed to redirect the user to a malicious resource, likely to download a further payload.

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://soxebez.ru/award?keyword=hr+executive+interview+questions+and+answers+for+freshers+pdf
    • http://hayatevesigar.online/amarnath_ki_amar_katha91han.pdf
    • http://tricitysikhs.com/miwipiboritdflp7.pdf
    • http://liwurivosopap.medianewsonline.com/when_should_honda_odyssey_timing_belt_be_replaced.pdf
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5ff8f1153a60e.pdf
    • http://ilkertr.shop/how_to_thread_a_brother_sewing_machine_jx25170qo5l.pdf
    • http://rajukilodagoje.mygamesonline.org/world_history_textbook_7th_grade.pdf
    • https://static.s123-cdn-static.com/uploads/4459328/normal_5feb413cd41cd.pdf
    • http://goods-amzon.com/flexible_dieting_bulking_meal_plan0430t.pdf
    • http://ag-management.space/rozepiburiwere56s.pdf
    • https://static.s123-cdn-static.com/uploads/4409102/normal_5ff970be47543.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bavotuvezomevi.myartsonline.com/votagefuxulazozamupo.pdf
    • http://zijiwaras.onlinewebshop.net/buvomi.pdf
    • https://uploads.strikinglycdn.com/files/635f5f7b-a162-4793-8011-fd9aef5702d5/51167069829.pdf
    • https://uploads.strikinglycdn.com/files/51786570-2363-489b-a583-45e1490dc71b/xasesisasujewabipatanup.pdf
    • https://uploads.strikinglycdn.com/files/ec020ad4-6eb5-472e-8c17-413883c6a856/fuwazeji.pdf
    • http://fabonejane.onlinewebshop.net/unix_and_linux_system_administration_handbook_4th.pdf
    • https://uploads.strikinglycdn.com/files/62ce5600-03a1-4363-b6d4-bebc2254f36f/nesokefusavipi.pdf
    • https://uploads.strikinglycdn.com/files/76ee3340-6ddd-4680-8c43-5d22db5aae96/pizezelojiveg.pdf
    • https://uploads.strikinglycdn.com/files/6aa323a7-c6f3-474d-ad6b-3e9c2a2d8c1f/25392146036.pdf
    • https://uploads.strikinglycdn.com/files/3cba89c4-ff6e-4b0d-88d2-4565583223f6/fudux.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_off0000fcdf.bin
47323c9d7948eeb122832bb5b17cc29fcc6e4fd7cc0114d8ed4571d6d423f205		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDF 5400 bytes
font_01_sfnt_off00010f45.bin
8508f77478b31f05755e0f03bc0430f8b4e6d680e6f8fc0a41ec24367f58088b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F45 10428 bytes
font_02_sfnt_off000132ec.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132EC 4324 bytes

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