Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bd35298d9e9feb…

MALICIOUS

PDF

70.2 KB Created: 2020-11-09 21:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b8983a16439b9039cdb6e87d47b31df SHA-1: d766824071e9a8d1cba10e398e7991bd40b1e5e3 SHA-256: 08bd35298d9e9feb6fc5f76c1545e5bddda1c8595b66d755953e7e29a4d6788a
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a very high probability of maliciousness. The document contains numerous embedded links, with at least one pointing to a known malicious domain, suggesting an attempt to lure users to harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?keyword=hacked+war+games+unblocked
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f9efe4d8eb53.pdf
    • https://vulagikivup.weebly.com/uploads/1/3/4/2/134234906/jidabedofesavopef.pdf
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/3834098.pdf
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5f9bc17b1a80e.pdf
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f8e346628a9f.pdf
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/nomur_womewulivusev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/131536d2-052c-4aaa-8874-aefdeb242222/mara_asuncin_aramburuzabala_larregui_lucrecia_aramburuzabala.pdf
    • https://uploads.strikinglycdn.com/files/b8ce91b7-c6a2-4b68-8894-8efe9cc3f250/5716282007.pdf
    • https://uploads.strikinglycdn.com/files/c55dd4d2-edea-4931-adb1-dfdad826afa8/hp_dv6_driver.pdf
    • https://uploads.strikinglycdn.com/files/f1197c30-7e8b-4035-95cd-047c3c09b456/vikefedidorepejiwalusidor.pdf
    • https://uploads.strikinglycdn.com/files/75f3331f-4f9c-4beb-a0d8-39af6777344f/97658867394.pdf
    • https://uploads.strikinglycdn.com/files/798ba3c5-b981-4378-ae34-9b6ae4072aff/bijobuwizaji.pdf
    • https://uploads.strikinglycdn.com/files/94830322-7e3d-4aaf-9c3b-ec17e4b70ed4/aspen_south_colonie.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7d3.bin
9a38793dcaf7e4a167b81d4f22a510ca89fd1cc8e45279826830b65105df358a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D3 5272 bytes
font_01_sfnt_off0000d9a6.bin
3849f92d9789f39f2d9378039ace1518e453cff924a65106310e7e8b2c7bc6c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A6 10612 bytes
font_02_sfnt_off0000fe03.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE03 4324 bytes

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