Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ecc384ebe8cea7…

MALICIOUS

PDF

74.1 KB Created: 2021-04-29 23:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 136a01a170f9ca98cfc11fca95c5aca5 SHA-1: 802666c646676d8271a48418b81895b728c60a16 SHA-256: 68ecc384ebe8cea74d19bb2859ff0e8745dd9970a8af89a9bc939951127cfa0a
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 0.9993

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=how+to+write+the+conclusion+of+a+lab+report PDF link annotation
    • https://cdn.sqhk.co/rujojumex/iFja6gd/angulo_formado_por_dos_bisectrices_interiores_ejercicios.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/i1Zjj0r/25007964058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_603c47fcd6d33.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/juvesasedojefizidukig.pdfIn PDF document text
    • http://vigastlens.xyz/dufidafowebazo502x4.pdfIn PDF document text
    • http://rewita.fun/49730982777bs8rm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421329/normal_605f7a00146f6.pdfIn PDF document text
    • http://dress-russia.ru/dosodabeviwaxubukujub4yr3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475209/normal_60090b34270f3.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/ujbyijY/viking_sun_world_cruise_itinerary_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/auWsgjf/arcade_archives_donkey_kong_jr.pdfIn PDF document text
    • https://cdn.sqhk.co/mobobelelu/gehYiK6/brave_frontier_tilith_sp_build.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/cJUjjge/big_3d_emoji_themes.pdfIn PDF document text
    • http://dawaliwiji.22web.org/carb_cycling_recipes.pdfIn PDF document text
    • http://frukt.space/897185327182dxne.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/hgidibp/45993957927.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e4dd5bf8-bd13-43e3-b37b-9624b2564f03.filesusr.com/ugd/093416_eb73263a00dd4219b5a6695f7bc1510f.pdf?index=trueIn PDF document text
    • http://zejagal.rf.gd/laniziz.pdfIn PDF document text
    • http://linitogusilol.epizy.com/blockchain_tutorial_free_download.pdfIn PDF document text
    • https://d6477b75-8e4d-4453-8bbc-a86a6009e57c.filesusr.com/ugd/261d41_bf611e8d18ff4ccf9c6077f595c4a7a9.pdf?index=trueIn PDF document text
    • http://xokokikiz.epizy.com/aide_mmoire_electronique_analogique_et_numrique.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_2d51eacccedf4e0498ac63e3f58c827e.pdf?index=trueIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_3d1d7549befc4045a7785745ceb9f17a.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_off0000e5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 5296 bytes
SHA-256: 843720d2acf59002a5b85c9a45ecb73f92be584a64bd2c9e47a739032a94ec24
font_01_sfnt_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 10464 bytes
SHA-256: 41fc624fada5c95845bddaf5ffc217e887e1c70bb089284f8c5dc99b59311e4a

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