Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff3d0940f92cddc…

MALICIOUS

PDF

64.6 KB Created: 2020-12-03 02:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8b9040c4f7e9875e8f646658c049efbe SHA-1: 9284a60490f37f1b888a8627522b56ab55fec801 SHA-256: aff3d0940f92cddc50c6dcb0986a18f0656b51bcd41e1442cd74954bd33fc746
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/123?utm_term=osrs+druidic+ritual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f9f5bc7265b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469626/normal_5fa337cce53c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_5fc81a1170451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5fb93a6377672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f9bec1ab4744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f89a0030c3a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9022b851-588a-40c0-a1a9-13036bcdd67c/walmart_fort_lauderdale.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/15841407913.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/gerojini.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/foldable_flight_arrowhead_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/difference_between_inpatient_and_outpatient_medical_reports.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_off0000c099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC099 4960 bytes
SHA-256: c32ed079ac86d1231241c839cac11844fc507308eabe721281afb760cd772585
font_01_sfnt_off0000d180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD180 10788 bytes
SHA-256: 51a5f27e97e6af802dab86b9b95c41e5e3f093cbeccce3a576f561796f1d163c

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