Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a14344371996db5…

MALICIOUS

PDF

81.9 KB Created: 2021-04-05 07:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a5e9b64b4ffd8afcfb2783bf773d06e4 SHA-1: 9bb5ac411f4f964945ddcd633f567fe81fb00455 SHA-256: 7a14344371996db54800a2c79dd97b3454c72ae0e94e0dc7d21c26ae7385e22b
156 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 0.9990

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 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.
  • 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://druttle.ru/wix?keyword=logos+ethos+pathos PDF link annotation
    • https://lifowedo.weebly.com/uploads/1/3/4/7/134707215/wurot-xafajav-juwewigitokawi.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/SiiQYii/bed_wars_minecraft_server_online.pdfIn PDF document text
    • https://latejurudawiron.weebly.com/uploads/1/3/2/7/132740343/7026127.pdfIn PDF document text
    • https://mikezopa.weebly.com/uploads/1/3/4/3/134366842/935613f7.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/iggcovZ/cowardly_lion_running_away_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • https://cdn.sqhk.co/xejexeremiso/QoyxHgf/vamabilizenivanikaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449397/normal_6032b0004bde8.pdfIn PDF document text
    • https://namonizumus.weebly.com/uploads/1/3/4/3/134345036/webajexan_pixepelirutexav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_6065f94105e05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_606535c835380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489058/normal_5fe79df0a04e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451754/normal_6056765f0e296.pdfIn PDF document text
    • https://senevabitup.weebly.com/uploads/1/3/4/2/134234896/4b95f29f23377be.pdfIn PDF document text
    • https://fisofomopix.weebly.com/uploads/1/3/4/6/134603918/7853779.pdfIn PDF document text
    • https://mixuzurul.weebly.com/uploads/1/3/2/3/132303374/1905948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kijelopazekune/blowing_raspberries_sound_effect.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_5709f160640c4357b4b5f2c3f69ea669.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotenu/xevopanonax.pdfIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_d2c2f3af1cd245838c19c2d93f5c614a.pdf?index=trueIn PDF document text
    • https://e7c02ae7-ba66-49ef-8fe7-d4c265c54a1b.filesusr.com/ugd/bc5701_b642980db0634d28a9d0e9a5b80b4906.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/estandares_y_expectativas_de_kinder.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/calculus_by_gorakh_prasad.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/sigazilidozuvumozad.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F1 4528 bytes
SHA-256: e4fa2eb0aecf5b6529bc7d44275a4f1ec0d9888c38968101ec7ce831b659b40f
font_01_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 10404 bytes
SHA-256: bdf8689385df2ffdacabc0f4ffe1aeeac2b9396ccfdaab3ae0f2d189501c5300
font_02_sfnt_off00012c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C17 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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