Malicious PDF — malware analysis report

Static analysis result for SHA-256 c51550837844a10d…

MALICIOUS

PDF

169.8 KB Created: 2020-11-23 22:27:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1bc477a1585b9a2e2c18ce6c0e0d7fe SHA-1: d184e0e6b456f0e87a06067c68dbde8d493aceb4 SHA-256: c51550837844a10dfa575fa6882785b10f4c54da3290b2d2185c5e7fbb67a54c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit users through a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://traffnew.ru/123?utm_term=deep+blackhead+removal
    • https://kipigifusulip.weebly.com/uploads/1/3/4/4/134437712/waneg.pdf
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f9ab5bda4985.pdf
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f8cc77f7a3a3.pdf
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5f9277637eb8e.pdf
    • https://winomexixuz.weebly.com/uploads/1/3/4/6/134621408/fedifalevegafor.pdf
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5fa19b64192bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pukiza/introduction_to_elementary_particles_griffiths_indian_edition.pdf
    • https://uploads.strikinglycdn.com/files/89533971-7fb1-40bc-aa64-b00aaf01bd28/44699932390.pdf
    • https://uploads.strikinglycdn.com/files/075ee72e-8fd0-40b1-a208-192458d0be18/nujewiwe.pdf
    • https://uploads.strikinglycdn.com/files/b843f98e-c543-4e0c-8b4a-016dbaf5621c/27129014495.pdf
    • https://s3.amazonaws.com/betefowubevat/bunapoxujudavufivixu.pdf
    • https://s3.amazonaws.com/fenatagazise/61937495497.pdf
    • https://uploads.strikinglycdn.com/files/eacea8db-58b9-4a23-b33c-0a8de5d2c23f/town_of_salem_investigator_cheat_she.pdf
    • https://uploads.strikinglycdn.com/files/e87c8beb-5756-4c80-8f75-9864fb791ec5/ap_human_geography_chapter_1-5_test.pdf
    • https://uploads.strikinglycdn.com/files/34f37687-654e-4707-bde1-ad59607548f3/bizovivinasonakuwavokok.pdf
    • https://uploads.strikinglycdn.com/files/e5310f36-a8aa-40d3-acf6-33c64903cb14/tropical_rainforest_physical_landscape.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_off000254d4.bin
4c47836baf052e1b5b3f671377456eac09d63b3bbb8183bb427924032af549b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x254D4 4952 bytes
font_01_sfnt_off000265a1.bin
d42e86a521a219c4c74e419af30edf3f7c562682d1104173b5df12a893b89bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x265A1 10996 bytes
font_02_sfnt_off00028b02.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x28B02 4324 bytes