Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f4d32b112ab001…

MALICIOUS

PDF

67.6 KB Created: 2021-02-27 03:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 62bd671241e3991372deaa085663a49f SHA-1: 67605800b6f73d2b3accc24e9f91adc4b6c22ae0 SHA-256: 59f4d32b112ab001572515054fa158a21e1229ebf7366e0c0079de00df3220b0
136 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV. The ML classifier also flagged it with high confidence. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests an attempt to execute commands, likely facilitated by the embedded URI which leads to a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/award?keyword=ya+no+eres+mia+lyrics+in+english PDF link annotation
    • https://cdn.sqhk.co/wepigosogo/1iigijd/remote_link_pc_remote_asus_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/j5jijid/bugzy_malone_rapper_merch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403561/normal_5ffa8cdb5a8ff.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/eOxUjb8/widatikixik.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/7FoEF0r/93057286914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_5fcd5dc22314b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5fe8bb64b62e3.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/4hcqehb/amp_capital_funds_management_limited_annual_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_601581debf4a4.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/3hcieji/velabidavagilaj.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/StKgjeI/voice_recorder_app_for_iphone_7_plus.pdfIn PDF document text
    • http://idem-peshkom.ru/13508386583hxd4f.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/cMdhe5c/percentage_calculator_change.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/xetasif/bufogelewek.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/nelofe.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/mild_chiari_1_malformation_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/guideline_hypertension_thai_2017.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_off0000cd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8F 5276 bytes
SHA-256: ca1ed152e1c101c6e52a95f5101c6514943d29a8341fdfc7feeacca6fe533364
font_01_sfnt_off0000df60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF60 10076 bytes
SHA-256: 8c1b4fb1d33019d5852fe9179dab8358c2b31988c5e6a7a5072ccf7143989147

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