Malicious PDF — malware analysis report

Static analysis result for SHA-256 9938cade3388d278…

MALICIOUS

PDF

75.2 KB Created: 2020-11-28 23:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 119fe83f3cc5ffd83b64e743d9c9a30f SHA-1: 8ba17b28953031c4c6cac633f82574d68c4d4835 SHA-256: 9938cade3388d278d29b4d1c33a1d2ac1ae8d5d885090a227aec23932eda84cd
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 to deliver a malicious payload or phish for credentials. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9817

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/aws?utm_term=chronicle+of+a+death+foretold+summary+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5f95ac90efb83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_5fb27ed3d31e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f8c54b691947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465402/normal_5fb4277190c9c.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/pomaxa/kendo_angular_sortable_template.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/77712403913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3978f597-07e6-42c9-9191-4068a3cb4ea2/42789160252.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/labawifabebonadisakufureg.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_off0000db49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB49 5404 bytes
SHA-256: 1beef915f0c5313915a59fe550816dc993d4f0362a9e11ce5909fecd27431aa9
font_01_sfnt_off0000ed7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7B 10836 bytes
SHA-256: 0f57b545e6798c577cffc37a93f67c6d21719dda2356dd3ab46556de6b9e853f
font_02_sfnt_off000111bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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