Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a66f57c17d3a09…

MALICIOUS

PDF

79.4 KB Created: 2021-03-24 15:14:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2f5a06f8b8c7b85eb406d4755a791747 SHA-1: 516c023ef6d25f16518b38ee2caf63d5b21b095e SHA-256: 59a66f57c17d3a0916b77a58057c9a908a0df1b1eead51c40c970444ca711655
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/123?utm_term=bransle+de+la+torche+piano+sheet+music PDF link annotation
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/6460612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_600f56baf3dd2.pdfIn PDF document text
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/8160212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_603a924d1f8ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415768/normal_5fc5ed29f1483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384159/normal_5fd7b4f227cb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375088/normal_6014d173dcf7b.pdfIn PDF document text
    • https://xixusumer.weebly.com/uploads/1/3/0/8/130814933/dorabefadam.pdfIn PDF document text
    • http://nopatoveji.22web.org/mupapoguran.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462037/normal_6000ea923a12f.pdfIn PDF document text
    • https://zesadokalefon.weebly.com/uploads/1/3/2/6/132681767/fakudapewufimijew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5feff04e9dff8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475382/normal_5fe52c2a8a1d3.pdfIn PDF document text
    • http://punejew.mygamesonline.org/how_to_install_simcity_4_mods_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_603b6ae8ba6f5.pdfIn PDF document text
    • https://jejusutib.weebly.com/uploads/1/3/0/7/130740078/4790430.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
    • http://josatagosovux.rf.gd/zazuvimilinumopomiliviwav.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/general_topology_nicolas_bourbaki.pdfIn PDF document text
    • http://jeropufa.epizy.com/how_to_start_a_sports_memorabilia_business.pdfIn PDF document text
    • http://tisavan.onlinewebshop.net/bahaya_narkoba_bagi_remaja.pdfIn PDF document text
    • http://lozabozirazal.rf.gd/80221588322.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1E 5244 bytes
SHA-256: 6086da6dc352646d9514eb41f92ff5ca59173e84d09c72022c2eebbb6823ed13
font_01_sfnt_off0000fbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBA 12164 bytes
SHA-256: a3933edf0f3239343531d4b14485bb7f25a6de86485a5502f22e3d984edd6472
font_02_sfnt_off00012218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12218 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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