Malicious PDF — malware analysis report

Static analysis result for SHA-256 473af0f369bc3b63…

MALICIOUS

PDF

76.0 KB Created: 2021-01-10 08:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4951f27dfd8905592f08a56f6a9ca29a SHA-1: df3c4050fdaef7e3bc13e01e52f5cd9b514c1a58 SHA-256: 473af0f369bc3b6383d79cd60c3fce0dd00fa735264e6662d3a8cde39226e61a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'parameter vs. statistic example'. No scripts were extracted, but the presence of an external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=parameter+vs+statistic+example PDF link annotation
    • https://site-1166670.mozfiles.com/files/1166670/dr__phil_soundboard_newgrounds.pdfIn PDF document text
    • https://site-1175941.mozfiles.com/files/1175941/79321763254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fc1d97cbae44.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/ggjiiBB/feisty_definition_synonym.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/jiHgjgf/acrylic_nail_designs_2020_coffin.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/iahggha/fold_up_electric_bike_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454287/normal_5fdee9e3094ca.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/veraxawewib/24686459495.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/64433481861.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/gafumojawijevipe.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/posijerilumaviguxofirafe.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/41285635508.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_off0000e0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D3 4780 bytes
SHA-256: fe6ae7d56f46d26f769cf8101123a3ea37640bad979c7e248e9a134d7fc879a5
font_01_sfnt_off0000f112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF112 10488 bytes
SHA-256: 1f169766006c8c1382ec857fa180fd07baebddf4d8ab0eec198d07570cbbe3dd
font_02_sfnt_off000114e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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