Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e5353f9666ef04…

MALICIOUS

PDF

153.2 KB Created: 2021-05-01 14:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 88145e55c1a9cc46040003597fe96383 SHA-1: b17bf0d61ad1a0514b6e4df92a1963ae325ff4c7 SHA-256: 54e5353f9666ef04516f559fdb276cf3a41b7601a16bf8d3a9973610ddaa0f04
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links that redirect to a suspicious URL, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing purposes. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristics point towards a common phishing delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/strik?utm_term=the+nutcracker+ballet+original+story PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408878/normal_606c99450c63a.pdfIn PDF document text
    • https://tazanuna.weebly.com/uploads/1/3/5/9/135977230/8152260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5feb497cb609d.pdfIn PDF document text
    • https://loxajutuwaguxi.weebly.com/uploads/1/3/2/6/132681393/vatofezodebig_visazefajet_memisewid.pdfIn PDF document text
    • https://xugeguva.weebly.com/uploads/1/3/1/4/131438310/7151496.pdfIn PDF document text
    • https://komiwafaka.weebly.com/uploads/1/3/2/7/132712661/kakumupijadidukixefo.pdfIn PDF document text
    • https://wewuketis.weebly.com/uploads/1/3/5/3/135327502/2428518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_603a1fc87341e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387571/normal_60073ddcf200a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3789e5f8-265e-48cd-8836-241a044b7ceb.filesusr.com/ugd/45ef7e_bdf2251eff5f426caab784391395c029.pdf?index=trueIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_6af505aba8de47ea973d0565b93f9921.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_877ee43b28794750809cbc6218fb6974.pdf?index=trueIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_2eb0b915a6c347bbb3df8d51cec038c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/facebook_image_er_online.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_54b50ed6068f4508a095374f9af1a010.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/47801559481.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/how_much_space_does_sims_3_take_up_with_all_expansions.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/introduction_to_information_systems_for_health_information_technology_third_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/zufinuduvoloroduzajinuto.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/bifubimijiladawusidid.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/kerepokakoxoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/crowd_1_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/31061610160.pdfIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_3c57299161c04a96a90bd02f6b859096.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dadupawo/kixuxufikuzofariroba.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_b4195548bf7b4afd9d1cd0117db53498.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F666 5316 bytes
SHA-256: 2a624e87844f39b9f9b9bc3de720f66ecb3a7500596f68545f051a6ce7fe8714
font_01_sfnt_off0002087c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2087C 18868 bytes
SHA-256: e420eae2d7fe532170751a3284b110bb91ec350a55025050f55e2f39b81261aa
font_02_sfnt_off00024064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24064 16120 bytes
SHA-256: 73e2bae015806fcbcea00a5e77fef36cf57312733aebee32ba98308b5ce41d75

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