Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e35a80d9324e739…

MALICIOUS

PDF

86.2 KB Created: 2021-03-18 06:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b553969b834368b706b32f73851e7646 SHA-1: c2539b9f0590b46593a610143508d1d7c28800ba SHA-256: 3e35a80d9324e73978de768d8013240b86fcf8e3ed967c8ace2c3973cf8b067a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure to disguise the malicious links.

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
  • 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://pelibifir.ru/strik?utm_term=abu+garcia+black+max+spin+combo+301fd+562ul+2-12g PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459319/normal_60360fcfd6ef9.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/what_factors_affect_the_kinetic_energy_of_an_object_and_in_what_way.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472753/normal_5fcd54a594aad.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/51401499135.pdfIn PDF document text
    • http://checkmycredit.info/worulesuzotazut4347u.pdfIn PDF document text
    • http://eurostore.info/74316217694kz8gf.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/worlds_of_history_kevin_reilly.pdfIn PDF document text
    • http://help-igcopyright.xyz/pasijaxokonikonovexamusqnwcx.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/mechanic_shop_business_plan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480161/normal_5ff7a91fe235f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_11fc59acb36648bf87cfb8112486e543.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/28890760410.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/scorched_earth_cave_guide.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_092863497ac7457984a1a9349a120a6c.pdf?index=trueIn PDF document text
    • http://mugazukadum.onlinewebshop.net/kifit.pdfIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_3ce36cef3df8428492d6780d704f5eae.pdf?index=trueIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_02de594b800645bd811d54e10b4a53d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jikopot/fodivusozawosalawe.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_1997a59e740748368bb3ad4dcd12651d.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_off000108df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DF 6536 bytes
SHA-256: 01c22f9be677dc319c188c14f1fe650c07202e7bf6d2017850edbee5fb07badd
font_01_sfnt_off00011f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1B 12712 bytes
SHA-256: 47a9d58dc8d96962f94298bb817a36010ee88a7eaabb83f0f2e8e316098967d7

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