Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9b129436b48923…

MALICIOUS

PDF

73.8 KB Created: 2021-06-02 22:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2db07fc245c61f8c99c783114b3187ab SHA-1: e5355b4f600771e4909a6a5c32f731cd3ba5f94d SHA-256: df9b129436b489239ff63e18fdcf19f0e6fd06b82f12d94264032866ab772fd9
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://pixomot.ru/pbw?utm_term=rhyme+scheme+example+abcd', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated and appears to be malformed, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pixomot.ru/pbw?utm_term=rhyme+scheme+example+abcd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366350/normal_605143beb6189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455396/normal_606747ca83853.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4417419/normal_60b2047ca9218.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458852/normal_5ffb9698ddf48.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4390382/normal_60b1aaf18979e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381752/normal_6005f52a529b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_60599ce3165af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_6033edc00940e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481278/normal_6028f97c07852.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500440/normal_5feccdd778aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485573/normal_60297931d67a3.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/92e5609f-e68d-4757-9244-9c82b78aa58b/craftsman_skill_saw_blade_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad3c945-f5a5-4d02-a205-83422379952e/rixisupozuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/279c954f-1d6a-48ab-9d07-0299a96b944a/62650774418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b35847a-9b29-4dd5-b2fc-cdaacfaa74f1/piraxodibosege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fb3c8d-8d0b-4c76-8a7b-d5701056a0a9/wixasilejaxipejimilobewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c4c7f2-475f-436f-9086-539b47f28093/74261557127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038f8704-3713-414d-b3fb-e0d0ba4f7fa2/sculpture_le_passe_muraille_paris.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_off0000e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 5532 bytes
SHA-256: a9650b399324b6db42a938a7034fbc4db05d5e755d192d07a506468c12a52542
font_01_sfnt_off0000f72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72B 10428 bytes
SHA-256: 9f7a4853aa2bb21d8cf75c3d713cbcce113c851012f142b0d78f5a0e1de3e12c

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