Malicious PDF — malware analysis report

Static analysis result for SHA-256 de787ec790f16edf…

MALICIOUS

PDF

66.0 KB Created: 2020-12-17 00:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aae22b27b6b690bdd195a7cb83afb022 SHA-1: 9127ba1b064d96cfecc50c9c4ddee17ce9dabd1c SHA-256: de787ec790f16edfd599c2dcc32dd65a78e24e95a88a4d79005ae4c2611db9e8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://traffnew.ru/123?utm_term=camp+invention+2019+promo+code', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI is sufficient to infer a malicious intent.

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://traffnew.ru/123?utm_term=camp+invention+2019+promo+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465924/normal_5fa611733edb7.pdfIn PDF document text
    • https://fologonalufofu.weebly.com/uploads/1/3/4/6/134694067/gupowunujegetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5fd2833cf3977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5fb7338ec4d21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467038/normal_5fa9bccb562c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc00c29085bf90c0ef85582/t/5fc1461f3f75b16643036b33/1606501920104/fagajokekemejunagez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9cc21a-cdbd-4f16-802e-8524725051df/noridejivizaseputo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4627a98-2611-4439-a61c-953102fcb6f5/70500472623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d26a49f-e5bf-4ef9-8c05-fdad66896ed2/zopadoxadifaferifub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/918ff9f3-705b-4811-bcfd-abc9c807b5d9/wejezupitumo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cc22affbf90a66037377/t/5fc62d613485235c86996e3d/1606823265772/nofuguralemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8481be54-1b60-4269-9aeb-afccd4bc428b/total_body_modification_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e0f2b8-3cd1-4910-865e-5c0756b5d027/16921984229.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_off0000c3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C8 5456 bytes
SHA-256: ed56a86a381aac82b0210e90527ec6b3419543c2a27ccb69fd8ad037254572a7
font_01_sfnt_off0000d649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD649 10940 bytes
SHA-256: ed6528aafbe1caab527ab37761735da3d84772e035f7754ab2cbf585711431a8

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