Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c6c7020b497308…

MALICIOUS

PDF

88.5 KB Created: 2021-07-04 12:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dd86171669c26fe04e1da54b8347df73 SHA-1: d122dd7e39267ced5c0aa187f6f8e59754f001c7 SHA-256: 09c6c7020b4973087910be95f845bd11643cb25b8f6ca02174e27e1be15f06a9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised websites or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://np21bellapalermoshopping.it/file/73709469673.pdf In PDF document text
    • https://botorka.ro/userfiles/file/basusuk.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/45775665327.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b357f915386---duvekosofakisoliwi.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160769871f3b69---sasopijokezoxanani.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/92999517323.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d512aec383---10883522888.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609488568f62c---7741860403.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/zikorudipufobujowedisedef.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714eaca9da5---74490569716.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/zipabemo.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/64d61b712372f76833066f8d779140df/boxisojilufejebabupodogen.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/8f9c0a5e5dcfab5c72823c4ac92f1046/rasobeviwitevekol.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/733480681.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69f67a2d8b---98004781362.pdfIn PDF document text
    • http://93564497.com/userfiles/45640571105.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9ce30dd01---nulobisutovudujaz.pdfIn PDF document text
    • http://tragadsonisurat.com/ckfinder/userfiles/files/rixorinanotovexutu.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/9973944968.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/467n2b4o4t07negd7rm0lquhu1/pevuwitilirol.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd865de3fd---detivakijebixobezelujovek.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/4cfe6d6841e0b18f01066ada0a8b9b1d/vozelejegipozemiluzav.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/q0vs0t5ec9vnrfhe2en4futbev/pazonewatozanilajenatibe.pdfIn PDF document text
    • https://krossi.ru/images/content/files/nizutegavokogokagokovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=various+artists+auld+lang+synePDF 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_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 19104 bytes
SHA-256: 11a4c7be291a9579da10305b2254e866c7e9f1b0d8204fd02c8d68d9f02de7ff
font_01_sfnt_off000122cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE6 10608 bytes
SHA-256: 991d39c37c2f11beed46321ce8587daed9fbb6de641a066ebe82b5a6bf58d6ca

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