Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ddc40c444f69ff…

MALICIOUS

PDF

103.8 KB Created: 2021-06-27 03:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e57454e56a5dea98394a87b2412ee2a0 SHA-1: b29972b5cfe48cb63097557dd767dec015323268 SHA-256: e5ddc40c444f69ffb04b4638e0ade71fb0f347454238654373c3098ff7764c7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to deceive users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b929869f3e---49236234790.pdf In PDF document text
    • http://taxicityplus.ru/userfiles/file/82173466578.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/0da2bbjv3hnrgvvflavceleelh/43032455338.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/vevofkdnmbgeohas0gv32lqr8l/nedafasasadivasosi.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb910a8a99---70965662493.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2755553de3---wivil.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/29001759895.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/hcpru84r838s8c4kmqtjoangt4/rovomanexosupudebafagoret.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/tokuwapulopasamasusozevup.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/085b5506aa0ea734a07203398e45da51/64703426089.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/ba77cc694fecbd6eef49d779778ae201/89995474522.pdfIn PDF document text
    • http://sterkrade.net/ckfinder/userfiles/files/50712007757.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acd0a83b3fb---92108363501.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763a49a3e2c---tikurafisijutapipalof.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/573d732fe5932abc6ac787523847a9b5/8406598406.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3f8f0dced3178e23914c2ef8a841eb05/60390882893.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/votel.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/si70l0kdmn47d77dr7tefr1g1n/44332634766.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/fejeposi.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/14372816a5e7f68322daab5f87d322fc/wumumajoxubimoma.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608302333e9ef---40831864912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=zeros+and+multiplicity+of+polynomial+functionsPDF link annotation
    • 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://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_off00012c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 10956 bytes
SHA-256: ad00fa4f23a66a1eac99a3c58d1ca4fb7113367a906fc1c766d351f03380ac07
font_01_sfnt_off000145ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E11 18756 bytes
SHA-256: 93689ab36ffb671cc950965ffee731623cf4d6c9bcc61555d8376babd9307675

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