Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1b065e1ac6b5d7…

MALICIOUS

PDF

72.2 KB Created: 2021-02-21 00:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 997eab9751880481af29b0f845e8061f SHA-1: c5b517d047afbf4266d3841d4faf27a9a2934a1f SHA-256: bf1b065e1ac6b5d7469697d71c42825705c2eb603a28f62972ebc3ae561f9509
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://seumenha.ru/wix?keyword=is+theravada+buddhism+monotheistic` suggests a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a delivery mechanism for malicious content, likely a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=is+theravada+buddhism+monotheistic PDF link annotation
    • https://cdn.sqhk.co/fomezawelud/7XbDyNg/busefusolazajuvure.pdfIn PDF document text
    • http://bestrongbyg.com/what_is_airprint6z7es.pdfIn PDF document text
    • https://cdn.sqhk.co/romekeka/35W2Gij/oscar_pistorius_olympics_2008.pdfIn PDF document text
    • http://instahelpforbusiness.com/25142175931eftgl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388282/normal_6028f318d5ccf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497697/normal_5fee8d6d4b9ae.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/8Mgjha1/pisoso.pdfIn PDF document text
    • http://jibiduseg.22web.org/50586039447.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fewifuwu/76977567704.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/96372302024.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/game_of_thrones_novels_in_chronological_order.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD132 5168 bytes
SHA-256: 09523227b9eef0563720dab7d4ab294e09a1a8786974b691c1a3adb01c4368c8
font_01_sfnt_off0000e293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 10372 bytes
SHA-256: efa1e4bc02b5a7ac2a2c824465c5e4c33d3f17597c2d9d12ae42fde8eecf0594
font_02_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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