Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd00af60d07ff50…

MALICIOUS

PDF

92.8 KB Created: 2021-09-19 22:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee6b253704cd2c7e1e640ad92093c4ae SHA-1: 53b0007a3c440ed7056b148f9d2fdd080c5c94d0 SHA-256: 5fd00af60d07ff504a953dc2b251816c9044cbbf9d911559bb14ce36fa175f4c
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to download and execute further malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick the user into believing they are receiving a prize or parcel, which is a common tactic for advance-fee fraud. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=effective+c%2B%2B+third+edition+pdf
    • http://a2hgghk.handylover.com/upload/files/32913195665.pdf
    • https://imad0c0.com/js/ckfinder/userfiles/files/27190496168.pdf
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/baguzevuri.pdf
    • https://hospvetcentral.pt/site/upload/file/89967035055.pdf
    • https://faktxeber.com/resimler/files/bekufefigutapena.pdf
    • http://adaviestransportltd.com/userfiles/file/95242894107.pdf
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/35589648214.pdf
    • https://ccaquebec.com/userupload/files/79296319378.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/91046515694.pdf
    • http://hrudolf.com/userfiles/82979862756.pdf
    • https://cnn-logistics.com/asset/files/vuwerigoxogodasaz.pdf
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/51045269816.pdf
    • https://franchiseharbor.com/files/files/50257881289.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/e079f3b6f78db788200cb580bc2ff9f0/luzepubojenaxi.pdf
    • http://gocoachfox.com/userfiles/file/20810569576.pdf
    • https://suksesunited.com/contents/files/60759875140.pdf
    • http://wonsakai.com/uploads/files/52326748859.pdf
    • http://maszyny.pl/userfiles/file/52709107947.pdf
    • http://motopujcovnateplice.cz/userfiles/file/nixawogudofopom.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133613373953---muzibevonubeju.pdf
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/lorubosobefuta.pdf
    • http://studiolegalebisantis.it/userfiles/files/pipasakibi.pdf
    • http://sivam.pl/files/file/sumidumujofakojarod.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f97a.bin
f68d602bd441ec7db29f0266186d2c2edff6e6533b5b453444d0f938345ec94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF97A 10388 bytes
font_01_sfnt_off000110e2.bin
97f7082fbe1e8d349a427afcc51770ad90f3b06dd636dea6eb015318683ac675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110E2 23236 bytes
font_02_sfnt_off00014d79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D79 16792 bytes

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