Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ffdf0d53475d2a…

MALICIOUS

PDF

81.2 KB Created: 2021-04-16 04:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e07eb90c1362dac6f646fb3a985acd25 SHA-1: bac71d09b424d3601b29601cb51a0ccb053ce67e SHA-256: 31ffdf0d53475d2adc79ac853c93ba7270d4fe60cde3659816e3141ab88d02d1
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. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to trick users into visiting a malicious site.

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/strik?utm_term=strength+and+conditioning+training+for+weight+loss
    • https://jiwefirufij.weebly.com/uploads/1/3/4/3/134370204/jagebejuko.pdf
    • https://zibitevurus.weebly.com/uploads/1/3/0/7/130776177/d31d3.pdf
    • https://cdn.sqhk.co/nerurepaza/OidjgJ3/performance_evaluation_form_template_free.pdf
    • http://befemuvejizu.22web.org/75132870943.pdf
    • https://cdn.sqhk.co/nanuvoxeva/lMdGfvB/all_information_about_gst_return.pdf
    • https://cdn.sqhk.co/tumowara/kWhfAij/venice_tour_guide.pdf
    • https://cdn.sqhk.co/feduvefas/ge7jvj7/repinukajelunujivat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/toliwudalamem/free_time_worksheets_grade_1.pdf
    • https://uploads.strikinglycdn.com/files/7e37296b-5f92-4880-bb7b-b8160225a3d2/flysky_th9x_compatible_receivers.pdf
    • https://uploads.strikinglycdn.com/files/d86a2bf3-73b1-4651-847b-4ac1fe48b92e/how_to_use_kali_tools.pdf
    • http://gibevupotomozom.rf.gd/xuninuwakovaxetew.pdf
    • https://uploads.strikinglycdn.com/files/6a3350a6-1859-4fbb-90aa-97feb9b3fd53/89737299105.pdf
    • https://s3.amazonaws.com/taguxif/adobe_illustrator_watercolor_brushes_free.pdf
    • https://uploads.strikinglycdn.com/files/3747a0fc-8437-42a0-be0b-6442b80db17d/six_of_crows_characters_mbti.pdf
    • http://ferodokibaw.epizy.com/4705037361.pdf
    • https://s3.amazonaws.com/gurafoga/is_._cnet_safe_to_use.pdf
    • https://uploads.strikinglycdn.com/files/ac1549a2-35d7-4fc3-a0d0-2107de1e68cc/powukosedisoj.pdf
    • https://uploads.strikinglycdn.com/files/cd4d509e-2b6c-44bb-9fb2-2e60727b1683/47119542788.pdf
    • https://s3.amazonaws.com/mizeteb/49063693116.pdf
    • https://uploads.strikinglycdn.com/files/f63bc601-1874-4f4d-aeb9-e92ce5ace40d/toyota_corolla_2009_price.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_off0000fd3e.bin
76eda64ece24afe29534a0e8fbc0d6b8dc73b0277945f3dd8c214aab9f1a227a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 5480 bytes
font_01_sfnt_off00010fed.bin
6163973fb9fb6a7af8b368080f4672f53b1f349068e7dfcca425771904a12bf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 11156 bytes