Malicious PDF — malware analysis report

Static analysis result for SHA-256 4516e3f79d7f1238…

MALICIOUS

PDF

59.8 KB Created: 2020-11-11 00:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ec02a6474ea8b41d679bff20f0fc7881 SHA-1: b6e3b108ad204e9f0ce8d4cf496584747ffbb715 SHA-256: 4516e3f79d7f1238d40717258644fef9560a3ddfd0d4ee7825806abc830d4ab6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://traffmen.ru/aws?keyword=aqua+logic+manual' is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?keyword=aqua+logic+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_5fab0e8579dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_5fa64baf1ad35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5fa8c81e9ad48.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://uploads.strikinglycdn.com/files/4a2e91b5-6400-44f6-92c1-5d437e630f52/96552632228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28dc8af9-881c-4f43-a499-b90e9a6455fe/aeronautical_information_publication.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/vofif.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/46502384799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0142ffd-106d-4b32-9584-a7b44fff7078/a-check_global_background_check.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322b500c-4a85-40e0-8c65-2e624222324c/68013021761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6a798b-b027-4db1-93cb-694b2dba7857/rufifetonal.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/download_beetalk_apk_2017.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_off0000a4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B7 4644 bytes
SHA-256: be07f02737f72b9c4b9e8faaf0d782dcabcb5b005a79fcccf21e14316b89f4f4
font_01_sfnt_off0000b45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB45C 9608 bytes
SHA-256: af6353882ef3a39151669f306442af8a33155bb92f3ac4f6ccc9bd097e670669
font_02_sfnt_off0000d50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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