Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f478d624f95837b…

MALICIOUS

PDF

71.3 KB Created: 2021-02-20 03:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a82cfe2f278df184127c834c709719d1 SHA-1: c9f418cc085f78137b1c8a798dd9537fd90aa387 SHA-256: 0f478d624f95837b3d9b513c5396829d535ba321187c68412e6cef1fd50cd342
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/123?utm_term=the+rules+of+the+game+1939+characters PDF link annotation
    • https://cdn.sqhk.co/bujerinalo/wgcJgfk/gisotulaje.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/560887ce72f944.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/ifigxxA/vodafone_yan_mda_cark_ceviremiyorum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389606/normal_600311259900d.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/ax8RlpT/joker_why_so_serious_wallpaper_for_android.pdfIn PDF document text
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/vapudapa.pdfIn PDF document text
    • https://ragurinibobuma.weebly.com/uploads/1/3/3/9/133986244/nomorelot.pdfIn PDF document text
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/wipetovimobinojod.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/Dhhhcjf/mastercraft_crafting_and_building_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/jebumujo/9LtmJBF/5116631404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_5fe8c8c8e459c.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/jgizig2/traductor_idiomas_amazon.pdfIn PDF document text
    • https://mezinetoxapim.weebly.com/uploads/1/3/4/8/134887379/1473977.pdfIn PDF document text
    • https://cdn.sqhk.co/sologavabo/ugd9Vja/46518088695.pdfIn PDF document text
    • https://cdn.sqhk.co/pevukoza/bjjB0RO/fairway_solitaire_blast_apk_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/microsoft_access_computer_inventory_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/opera_mini_java_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/34655919340.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_off0000d840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD840 5616 bytes
SHA-256: 12eea268a3a42ea715592db4006924dc30e24b8f12d5e08417787b2586931dbc
font_01_sfnt_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 10884 bytes
SHA-256: ae6ba818c43cd8de4a61a37a315d0477e5ce63ba50d7d442e5154a189012bf07

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