Malicious PDF — malware analysis report

Static analysis result for SHA-256 721f8d76f2cec45a…

MALICIOUS

PDF

212.0 KB Created: 2020-12-20 09:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1bce245865a482c9333eff9822bff19d SHA-1: 7f9357ae52b738de1abd125b00191067cf0d1be9 SHA-256: 721f8d76f2cec45a50c8631057965145437df4bda20689ad369d23ce05a39a5a
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 PDF structure and embedded URI suggest an attempt to exploit user interaction, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8071

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://trafficel.ru/strik?utm_term=funny+dirty+emoji+art PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465128/normal_5fd79dd559f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5f9786505b8d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5f91af0b1e0ab.pdfIn PDF document text
    • https://tilobumofiraji.weebly.com/uploads/1/3/4/4/134492377/7335430.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/55e3cb5ce70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5f968725492d0.pdfIn PDF document text
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/968850.pdfIn PDF document text
    • https://figuzenage.weebly.com/uploads/1/3/4/4/134472600/948142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412900/normal_5f9b0c9c625a8.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/5424bace-65c8-4e0a-a70b-86cbd316d0fa/phoenix_reptile_show_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e2e662-6661-4888-8e49-b3feadc7854d/tajuwitoxafuxuzaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59dc0dbb-1235-4d47-a40e-cfa78e828f92/vunupuzidonutupasos.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93F 6900 bytes
SHA-256: 3e997f7af6de21dc24641c1cea42efb627d719d0d46e8690871f083f8b8e0349
font_01_sfnt_off00010abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 3492 bytes
SHA-256: 3ffa64a5847636303035022153b402e0bc2378dacbae9340b77c5d3143a8a0f8
font_02_sfnt_off000116eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EB 4896 bytes
SHA-256: 656b5b2b2c28e2ad03be9af4aace2bb49827689ab13affd0e1a0b99d7f318fc0
font_03_sfnt_off00012747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12747 6372 bytes
SHA-256: c9652ba566a1ea77944a1c04b4672f819bf061ebcdaf41e351bb2e18de1587ee
font_04_sfnt_off000136f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F8 158360 bytes
SHA-256: d14c960881c0eba562022d763904afb972b61513312161b2ef7a75f8aba2ee6d
font_05_sfnt_off0002e96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E96C 10120 bytes
SHA-256: 056304500d9d2e79b16519f563e27b5a8b5f2e06e806be0d24a8b97859f597b7
font_06_sfnt_off00030c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C30 33324 bytes
SHA-256: ff2ca29de60c6cafea83ecd84092b174f7d54e6d1bfebfbbbc313f5cdcd05499

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