Malicious PDF — malware analysis report

Static analysis result for SHA-256 24deb0f650ecd071…

MALICIOUS

PDF

68.4 KB Created: 2021-05-27 04:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dd1cb39d2274cef2d6702a767107a725 SHA-1: e87f18458e5b8cc831ed13ee038c4a73dccaefc9 SHA-256: 24deb0f650ecd071f93dc54f62dbdc0ac8cb40dcf15058957eadce276ad09266
96 Risk Score

Malware Insights

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

The PDF file 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, classifying it as a phishing trojan. The document body, though partially corrupted, suggests a lure related to business planning.

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://gimoguvi.ru/strik?utm_term=how+to+write+a+business+plan+for+pig+farming PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fd6627dd040f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488807/normal_600264e513801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490930/normal_6056a77c46d67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480382/normal_6067f5d54ba93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_5fd7c238441f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_6019d4dbda35b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485005/normal_5fc6c915524a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_6025b5ad8d020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488116/normal_60642f9f43208.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402706/normal_5ff3c4412e273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5fdac5cac7782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405190/normal_6057e9e9207b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387232/normal_5ff3b4004982f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a1514d-4ef7-439e-81f2-ef70bbb001d2/what_to_do_if_gas_stove_keeps_clicking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98165f30-dfb2-4ec9-8485-f93aba8bc1ab/5288191376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e54edb9-968d-49e5-aa92-7946e89c4d6d/united_states_army_branch_insignia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52e5724-49a7-4990-9f13-890f40276aac/saxurupekudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9841f485-b773-44a1-b7d0-4f2394d677fd/hp_photosmart_c5280_ink_cartridges_problem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53ab7a2-4bd0-4b0f-9188-c827d0100417/pevasawomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6264f47-2c98-4ddb-b0da-7d43d882cec7/relemavebukuguwurel.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_off0000cf8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8F 5416 bytes
SHA-256: 44f59ca16dc8ac7c72a3ea90095ed7ae1434ffbf8617c4323ee3ba566ce0b0d3
font_01_sfnt_off0000e1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F0 10132 bytes
SHA-256: e0e5d6c80ebc5c386944116cbec9f8c9fbebc1c1e3e3577bfffca7bcbf102b92

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