Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3144c7cdd59b61…

MALICIOUS

PDF

102.2 KB Created: 2020-12-21 10:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9f5e085aa1f9a4edcfc0bd122a949fc3 SHA-1: ed234b39c403c42bd4e6fcdb13c93fd016a15bd6 SHA-256: fb3144c7cdd59b61bde0eca78c8f4a77acbf8cfb58a4f26c516404e0a45c5c4f
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a phishing or credential harvesting attempt.

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://trafffe.ru/123?utm_term=james+b+weaver+apush PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449599/normal_5f9e7a8f797dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_5fc061bf162f2.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/0357a72b-cd62-4f7c-afe0-940f6e4addb4/19691508118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90169340-ebe7-4b6c-81ee-837165a7f589/philips_norelco_7310xl_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/gegelogejetoxomibotomeva.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf3e78d6066e35386818d1/t/5fdf91f1f3f88b619f233b5a/1608487409996/ata_guidelines_2015.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d024a87939686421378a/t/5fc50df04f983757207ec2f9/1606749681075/bobewazapobolefuxuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d776e9-ce9e-445e-9959-47d131c80b0c/nostalgia_kegerator_krs2150_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/203166794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a479587-7364-478b-a623-c49060bb5c5f/top_gaming_news_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3c40a5-a821-4994-87ff-6eba0469340a/lerotu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3c655d26ff1194f85c811/t/5fd0533fef76c20f2d4598fb/1607488319446/20543788068.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce103b888ad70830ba8860/t/5fcf3aa01901dd4d2ed02796/1607416480953/switch_controller_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f11b88b-ec8b-4e93-b64d-2b36006a201f/sexawagoxatatexisot.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_off0001539d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1539D 5308 bytes
SHA-256: bd84d1c6e47145d6215d09f171648475700cbae70d76d83ded9fc577966b5586
font_01_sfnt_off00016592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16592 11332 bytes
SHA-256: c5aafa1a52ae4f4e271bf9dca3cac0bbb45038f893af3f1f2bcb0f497db8aecd

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