Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6b13b634c2e70a…

MALICIOUS

PDF

82.2 KB Created: 2021-03-15 04:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 14c0623291eaf1d1948d02d56ae1a2c5 SHA-1: 20f9f537c71d5f6fbf611bc28d2a88f675dd0b4a SHA-256: 9f6b13b634c2e70a8e7be9f81bb867133d70d60f8831a835eab6299677a43a93
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=fl+studio+12+tutorial+pdf PDF link annotation
    • http://nugawijuxuv.mywebcommunity.org/32324402394.pdfIn PDF document text
    • https://fuwurobo.weebly.com/uploads/1/3/0/8/130814642/5803592.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/how_to_clean_aroma_rice_cooker.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/matuzowegusukita.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/netgear_n300_review_extender.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/ieji9gc/1010712323.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/aGigibk/genuzis.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/gehidjf/2d_vector_animation_examples.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405904/normal_5fe41876aa827.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/49404089002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482847/normal_6030328d3a99e.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/best_way_to_finance_a_bobcat.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/samsung_aquajet_vrt_washer_error_code_4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401515/normal_5ff46c80c0da8.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/mIgihdR/how_many_rockets_fired_into_israel_today.pdfIn PDF document text
    • https://nudesobaxoxis.weebly.com/uploads/1/3/4/6/134666739/1940366.pdfIn PDF document text
    • https://nurinakeviwiket.weebly.com/uploads/1/3/1/4/131407921/6692398.pdfIn PDF document text
    • https://dewosuto.weebly.com/uploads/1/3/1/4/131453399/nedafenebipu.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/xekemupolegifuwes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadozejeko.myartsonline.com/basel_2_document.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/58938225797.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/1794-aentr_add_on_profile.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_off000102a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 5172 bytes
SHA-256: 1e2539ef93bdfe2e21ebae245619302774663389120b069aa63150d952cdcc75
font_01_sfnt_off0001144a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144A 10840 bytes
SHA-256: b7b0fd10138cb29c574f5b662cdd271de9c32619157bfe533d1a7e6b538cfc2a

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