Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b4a83d79b3e061…

MALICIOUS

PDF

75.1 KB Created: 2021-03-01 10:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0bbf3ef29a38951883f4b23fe45b3487 SHA-1: cd0a4c744bc995ea204a53351f5881cc34a28e7c SHA-256: b5b4a83d79b3e061aed6dbbef1eb2b9faac581e0f8ee5b82e2b7875deda7e56e
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, flagged by heuristics as a potential phishing or malicious document. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for further exploitation or credential harvesting.

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://druttle.ru/aws?utm_term=graco+nautilus+3-in-1+car+seat+put+back+together PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446651/normal_5fd8b18600a75.pdfIn PDF document text
    • http://reduslim-officialsite.site/mamenilupenuia7k9.pdfIn PDF document text
    • http://gnatural.space/curso_de_bajo_electrico_para_principiantesiuln2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495395/normal_5fc8ec766c163.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5fcd3238d5dba.pdfIn PDF document text
    • http://fezivexem.iblogger.org/vinipogifo.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/aJ2TihR/3d_game_creator_no_coding.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_602c3bb54ccaa.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/fonazuzixagizir/copperplate_guidelines_paul_antonio.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/android_one_pie_dark_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/botudotal.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/pantheon_build_guide_s8.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/distributive_property_halloween_worksheet_answers.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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 5676 bytes
SHA-256: e821c3949af0b6c53b72a5050db9868964f066e9404dee6bc734712c9741d618
font_01_sfnt_off0000fb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB94 10528 bytes
SHA-256: 6dbede1b21d7c9e48de1c1e78b88cf912ba5dfc2339c0ea065f8e92d00d6c9d3

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