Malicious PDF — malware analysis report

Static analysis result for SHA-256 568f0fb7f19e8d32…

MALICIOUS

PDF

79.6 KB Created: 2021-01-03 03:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a243bbf54c27625f2c9eb9e801bd7837 SHA-1: da335f77c7b727d1edd13786f90518a4ac618c84 SHA-256: 568f0fb7f19e8d326d6eac40adac02f4db2d7f2bad72abb582fd6f39abd0c95d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'trafffe.ru' was extracted, which is a strong indicator of a phishing or malware distribution attempt. The document body contains obfuscated text and metadata suggesting it was generated by wkhtmltopdf, but the primary malicious indicator is the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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?utm_term=jamie+oliver+poppy+honey+rosie+oliver PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383574/normal_5fc1caef514dc.pdfIn PDF document text
    • https://cdn.sqhk.co/domuduxuro/hjijjFz/37604882588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_5fba939470975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5fbbbb9a45352.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/e9hc3jh/goxawusotefiragugepika.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/wisatutadi/depawebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26beb173-7ce1-492d-80a0-7f950dac375b/zomifovalipakovutexo.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/manual_de_autocad_2018_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47e4b72-5bd7-4d86-96a1-835a258b8222/migururiko.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/house_of_cards_howard_webb_actor.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/rolosipemudeda.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD282 5208 bytes
SHA-256: a98f18ae28d8ac3bd2fb8ee26f0630e515a3421cb9b7113899bef88e5af293b2
font_01_sfnt_off0000e412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 5492 bytes
SHA-256: 7f5b3b947dec5769e1b9118be4199ace023803ba7f33281d305ad76f9cd89c02
font_02_sfnt_off0000f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 10292 bytes
SHA-256: 9ac93148aedc6c7537c663e7399f8f439ced99571c1484f4b9064524a62b82bb
font_03_sfnt_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 16488 bytes
SHA-256: 82671152c878833e3f9abfdac7c8bff42fcc51026bb08f296acc876f37e34aae

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