Malicious PDF — malware analysis report

Static analysis result for SHA-256 5660f3b1c4d308f7…

MALICIOUS

PDF

165.4 KB Created: 2020-12-11 06:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06192741f016127100ed7f55400d6657 SHA-1: ebbd5b34705dd7314550c14f8b7b4a8255673676 SHA-256: 5660f3b1c4d308f7f90e334727efcf549b126ce2b397aaff0c0c959fedb5ed01
104 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to 'trafffe.ru', which is likely a malicious domain used to host or distribute further payloads. The presence of a 'download button' heuristic suggests a lure to trick the user into initiating a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?utm_term=hill+mfg+msds+sheets
    • https://momaramurelu.weebly.com/uploads/1/3/4/3/134309976/duvakij.pdf
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/jawemepuwiwifisuluf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/50e03c0a-74a5-4300-b69b-40f5f795c9e8/62538555384.pdf
    • https://uploads.strikinglycdn.com/files/76449479-c4e7-41e3-89bc-0c44b51dea20/sistema_metrico_decimale_storia.pdf
    • https://s3.amazonaws.com/zedudo/fedorutisutuzafuxukok.pdf
    • https://uploads.strikinglycdn.com/files/805fe36f-4ac9-4eb4-a001-b11017dc368c/watch_aladdin_free_reddit.pdf
    • https://uploads.strikinglycdn.com/files/cef7193f-c145-439e-950d-61b742bbcc20/guviduxugumizerobu.pdf
    • https://uploads.strikinglycdn.com/files/a5f121bb-1179-4e14-b3a6-1d11fd6ddca4/1245639308.pdf
    • https://uploads.strikinglycdn.com/files/cf01f19a-5f45-4bf4-8c61-5b1c0c16ace6/vonebolesenarazib.pdf
    • https://s3.amazonaws.com/nazekisigiduz/masked_forces_hacked_unblocked_at_school.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024bdf.bin
7d9349ede0a9ef52658e6684c74c62e42a387837bb4e439d7419b35a74437da1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24BDF 4976 bytes
font_01_sfnt_off00025cae.bin
806cae4a1cd9f81022f5eef0ad3c208aaa4914ac90320ad2e3959d3b91d953d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25CAE 12548 bytes

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