Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb9036958bbf147…

MALICIOUS

PDF

92.8 KB Created: 2021-05-01 22:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 06c4d64ad5800edbed4ccf7ab79c2408 SHA-1: 584750ea84c5f54a2429e0fd0f79153540c285f1 SHA-256: fbb9036958bbf147e27503d80ee7be0434829bf6d8b379c5297647ac97f54f01
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 0.9991

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=what+do+you+do+after+lilycove+city PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406776/normal_60087a61240d5.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/ichYsjh/94782463695.pdfIn PDF document text
    • http://euroshopmn.space/giancoli_physics_principles_with_applications_7th_edition_solutionstd5ue.pdfIn PDF document text
    • http://karaulovlife.site/15788905155y7w6h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411245/normal_5fc5c0008f65c.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/61153211037.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/drEuoK9/18881270444.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/ncees_fe_exam_preparation.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/bXqDgcA/3665891823.pdfIn PDF document text
    • http://pomirkapa.site/emathinstruction_algebra_1_unit_6_answer_key50mu9.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://creamwalls.space/731075967771llac.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/tewufoju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jibimom.myartsonline.com/zopijapawud.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/graphic_tablet_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/auswrtiges_amt_deutschland_informationen.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/kirtley_roofing_sheet_metal.pdfIn PDF document text
    • https://3c2b787d-8465-4662-bdcc-bf736d584291.filesusr.com/ugd/8760e7_23bae12fa97f4305acc8c6298dbef7ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/saxefi/pokerist_texas_poker.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/adivinanzas_biblicas_para_nios.pdfIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_2d0d0b945176483985e15a7d123dc8a4.pdf?index=trueIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_38d7232174a146f58f06d91f3881f680.pdf?index=trueIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_b4cc17663cf445919d8ba79cb7a7400f.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_39bce715caee4384bfc70dd10608dec7.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB3 5104 bytes
SHA-256: 91ae74c34b0dc38f581f5527e1a115de207f804a3beff132397067aa33379f11
font_01_sfnt_off0001402a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402A 11176 bytes
SHA-256: b43de6a3c2df8e423d1769b0e7e95c7c9c824a8b3220cabeb5df8d49b5c001b3

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