Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f542dfa51f9081…

MALICIOUS

PDF

80.1 KB Created: 2020-12-28 09:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9ca047a6f70f019f5faed4d759386366 SHA-1: 95ecc8bef97352219e3283de483456ab7cdfe55e SHA-256: 02f542dfa51f90812ee3574997d89aa1c9e3df0aee45a05f9939cdf1075e9139
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (traffmen.ru). The heuristic 'PDF_SEO_LINK_FARM' indicates the document is designed to host a large number of external links, likely to distribute malware or conduct phishing. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=excel+alternating+row+color In PDF document text
    • https://cdn.sqhk.co/zazavoxujub/QggigQt/duckduckgo_privacy_browser.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_5fa94fde45da1.pdfIn PDF document text
    • https://fudegedetet.weebly.com/uploads/1/3/4/7/134733785/jigijebir.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/idS8Che/tiny_bubbles_tea_bar_woodstock.pdfIn PDF document text
    • https://cdn.sqhk.co/vegubefeno/igfheS2/prison_architect_mobile_unlock_apk.pdfIn PDF document text
    • https://nofemifi.weebly.com/uploads/1/3/2/7/132710694/tizexezapekerus.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/yzBjhih/75706000013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406213/normal_5fa734e1bf06c.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/cd60d2e0-1366-4eed-ac62-7ef0f5897c8d/johnny_cash_grave_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8794cfc-13fa-471b-8ddb-08dc4315ba0f/wufinitadagisefojopese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca11488-e126-452b-b43e-ade553e4c98e/haidong_gumdo_form_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8384d2c2-81f6-4345-b771-bfbd86a75540/zonogaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43e0ebd-bdca-4f42-b6be-f8d06e07b1d5/escenarios_en_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc771f79-c378-4d3a-82c7-1f4d189f80a3/jim_rohn_goal_setting_workshop.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 4904 bytes
SHA-256: a616324ebc011de875e4187d09d07abc6af329e403a3260206832bd317bffdae
font_01_sfnt_off00010e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E24 10916 bytes
SHA-256: 8a3a55a0c503f23c2b0fa4de83b42114e91a7b23e8e82c46b0b5d87e4ec69fb9

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