Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3e3b7235e448b5…

MALICIOUS

PDF

70.7 KB Created: 2020-11-22 00:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97668df397f9bc796c91d6286fa4afa1 SHA-1: 7102d660356413c28159282adba1106d9c37ca6e SHA-256: 1d3e3b7235e448b57cb151cdfc585e4dd841b16e9d880284d2ed0d03abc40387
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

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://trafficel.ru/123?utm_term=arvada+west+baseball+schedule
    • https://cdn-cms.f-static.net/uploads/4469104/normal_5fb489d88fb23.pdf
    • https://cdn-cms.f-static.net/uploads/4502906/normal_5fb4e6b7144a4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/606aea4d-9478-429f-915a-9b2ce2c9c226/kugodatotiba.pdf
    • https://uploads.strikinglycdn.com/files/b656d10f-494d-4e84-89d4-216dbb1e6b8d/18430169794.pdf
    • https://s3.amazonaws.com/henghuili-files/functional_python_programming_2nd.pdf
    • https://s3.amazonaws.com/subud/dadafopu.pdf
    • https://uploads.strikinglycdn.com/files/b6105af4-1a55-44ec-a312-1eacbfeb3bcd/luvuxebafoxalavedisukuna.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/botany_plants_information.pdf
    • https://s3.amazonaws.com/niporofez/lizard_on_a_chair_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/05ddb662-f2e4-480e-a167-eb919efc8ed0/fazowelupalex.pdf
    • https://s3.amazonaws.com/doxifuba/zevivogiwopewenezawo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c17a.bin
fb34d56f19be9b66b1c8b1ed36298cd699399136cc5c32528516eef06916d414		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC17A 5308 bytes
font_01_sfnt_off0000d391.bin
ba4452eede281529539cfc3aa439e4f32a5525cf724623838a1210ef3317a04a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD391 10792 bytes
font_02_sfnt_off0000f8bb.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 16204 bytes

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