Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3c16925299d21a…

MALICIOUS

PDF

68.4 KB Created: 2020-11-13 22:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5d1a7ad67d36a6cb5314c63e9eee181e SHA-1: 11cb93c47c5ec348ab8f034ebba794e943179e87 SHA-256: dc3c16925299d21afb9a601befc38395b2d28c0780f56eb63a4e51047d5f8ae3
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'spy watch manual'. The presence of a malicious redirector and a large number of external links indicates an attempt to drive traffic to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=spy+watch+8gb+manual In PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/xaxepeson.pdfIn PDF document text
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/9378591.pdfIn PDF document text
    • https://fukoxifixe.weebly.com/uploads/1/3/4/4/134460993/5294723.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7702792.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/cd8428dc-484e-450e-b36b-6d430f38eca3/umatilla_county_jail_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123670af-81c7-4493-aea1-09a90d12a019/puwaporop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e015fa5-5ae9-46fe-a279-91a914639cea/musetibadufuraxef.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/normans_and_saxons_in_england.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5929055-f9ab-4b23-b403-28e52b1ba1e5/vofewogavixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04178c9c-654f-4a81-8814-8eab4c8a1798/vezukufixejez.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AA 5704 bytes
SHA-256: d8c955fb47af04e0450b2ad183477343295b6dab16bbb35958b7f72ee0416c4d
font_01_sfnt_off0000c80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80C 11956 bytes
SHA-256: a826601a77cb33f7cea84cafeea69366e70ab8b571a0b5bf85217eaa4a85b811
font_02_sfnt_off0000eea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 16060 bytes
SHA-256: 1018660efa6a1a00280f0dbd6ee9814149b2344b9acf14d98de2cb76d1e712aa

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