Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2a569c4bdba42c…

MALICIOUS

PDF

70.2 KB Created: 2020-11-10 20:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3a25d7088fc4674e2d00dd39afe43a2d SHA-1: e6be0ef8feeb3740ea66b7ac5d11e142a4a4f462 SHA-256: 8a2a569c4bdba42c25dc73a39c9e15eaf5bca0a82ca3a7ec4bcc8d2cea519994
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to relate to road signs, serving as a 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://trafffe.ru/123?keyword=blank+diamond+yellow+road+sign+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5f9d65eacd039.pdfIn PDF document text
    • https://mibakadediwo.weebly.com/uploads/1/3/4/5/134584598/8122206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5f96813aadac9.pdfIn PDF document text
    • https://jufopikigon.weebly.com/uploads/1/3/4/3/134309667/4305715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_5f927ad198902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5f8e4a8dc9238.pdfIn PDF document text
    • https://xumokiregiw.weebly.com/uploads/1/3/4/2/134266049/wizux.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/netodadofabe.pdfIn PDF document text
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/pikurojopisil_najujujogob_wofotibud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_5f96e4c14d8b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f8754440f73c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5fa210079a7c4.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/pizexopenaxu/the_color_of_family_ties_rereading_america.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/nanexobedusomaket.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_off0000ca49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA49 5160 bytes
SHA-256: 97f9a397fd1af9c914b5f72f32ae40010dbda506f4d086c6f2e0eab7089ca91d
font_01_sfnt_off0000dbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 9888 bytes
SHA-256: 1e3921e87d7d68e45327fb5d9c8dc582181237c5a7acddb72de1fdd413e5c507
font_02_sfnt_off0000fd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD94 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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