Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d14b30fa68ff791…

MALICIOUS

PDF

67.3 KB Created: 2020-11-09 20:07:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f1d5c171a195bfb5e98bc27bd2e6da46 SHA-1: 40b091c9da44e082c719ac703febde4608c42f45 SHA-256: 0d14b30fa68ff791b97496ad351e7cba93e42b6d7594e2a7e202cbe038f1331b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL and the heuristic PDF_SEO_LINK_FARM suggest the primary goal is to drive traffic to external sites, potentially for malicious purposes.

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
  • 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.
  • 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://trafficel.ru/123?keyword=oshun+gods+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5fa84a398ba8c.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/bolexevup.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/wipivamunapuk.pdfIn PDF document text
    • https://nuzimalufugi.weebly.com/uploads/1/3/4/7/134705392/zaxeg_zonumepobewojit_fobapajo_gipidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f99fc2371762.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/03144560-612e-4c01-9ce0-60b0f9cec83c/wixutapodakotabigidiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/266a28b2-86d4-464a-9228-20437a156e40/84452812592.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/59430650464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886fc86d-6008-449a-88ac-163195c64885/fegituzubofos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1a9a2f-bcf4-4388-b26c-b7d174646507/kuteselujugulis.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_off0000bf2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2B 4804 bytes
SHA-256: 0220919bf67e44c28e80d7de2a1f71569fa3a2437e213f05d1e9383140847e2f
font_01_sfnt_off0000cf63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF63 10276 bytes
SHA-256: 0501c6601c42b8c29afe19f69ccf8ee7ef0bd529904affcce998a998b961c4df
font_02_sfnt_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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