Malicious PDF — malware analysis report

Static analysis result for SHA-256 461efffb34284387…

MALICIOUS

PDF

75.9 KB Created: 2021-02-25 04:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5656a9cb5dfd8eef33786ae7daaa9ee2 SHA-1: 3a8c3fb9a10a5a828f7bfff59a821cfdf39d794d SHA-256: 461efffb342843878ee1a0e965e33b073281ee103f4c60822a9d38fcd593ec7d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://maypoin.ru/wix?keyword=muffin+man+song+id+roblox', which is likely a phishing lure or a distribution point for further malware. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, suggesting it was generated programmatically. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

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://maypoin.ru/wix?keyword=muffin+man+song+id+roblox PDF link annotation
    • http://makukenumeg.22web.org/36889058393.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/sound_blaster_zxr_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_60322c8c6e891.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/67142263760.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/zevegurav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475997/normal_602da83278ab6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499285/normal_5fec20995fc11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405660/normal_5ff0cc39bafb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423699/normal_6022cc1ba3d0a.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/cannon_landmark_fire_safe_costco.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/cost_behavior_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/teviwukidigoteluxidafujaz.pdfIn PDF document text
    • http://juvupakevunume.rf.gd/54802661504.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/voyage_birmanie_guide_routard.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/sharepoint_2013_video_tutorial_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/98260957336.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_off0000ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 5440 bytes
SHA-256: bfc3040097ae035028696b7fb7c7a69b033bc23e3b05a08d7ba4590020a0bcae
font_01_sfnt_off0000ff6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 10280 bytes
SHA-256: 0e36fd1a949558bea86a027b0ef1e67106d815f7414c9149209fb66fd12be787

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