Malicious PDF — malware analysis report

Static analysis result for SHA-256 901fbb336c52738b…

MALICIOUS

PDF

77.8 KB Created: 2021-07-20 16:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9a123c188aeff52e0b5f5f09a8a1fa31 SHA-1: 2469570d926951eff74e08203dabd75e330bb514 SHA-256: 901fbb336c52738b9ce70460e1f8b37381ac51e2bec44709ed72c1ed77a130df
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://tgtech-auto.com/userfiles/file/40065836743.pdf In PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a51f12ff75---29781851435.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/fazufik.pdfIn PDF document text
    • http://compsult.net/userfiles/file/momodesibo.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/rozekezefazazalopilebig.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/19o71vs8eoph4rde4765ofd0nl/zevuxaxuvifezekigowotagep.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c504d63e3b---11548767359.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/95458677439.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/136d4b374583d1efb60efc05aadea695/bipaka.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/72780ec574ee90f368de7278eec5885d/xodesex.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ed4690127---tewejetadopuj.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/20074189832.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/sp31a63f9itvoe4ktjv31v9ur5/zukilajosexuf.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/bc5bc9ae34a4731bc6d347aa7a85847b/womuzi.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/69835452321.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/p49ofts58i0k86br62oq7do5hi/61401106602.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/vedemabexu.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/ed775323def8cf96262890eb8592286a/kaxomokojunazogarenafob.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/2bee4338c600f909256060d009b8c261/sokavutidagu.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/cb8be16b7e3a3addfb75ccae98232081/bukutaj.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/56140334092.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/dexewatusago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ray+texture+packPDF 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_off0000cf25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 16716 bytes
SHA-256: 96d59bdeec1c8a022f1af09cf18b3406b64f252ad0bb85ecb68f2a1538208a90
font_02_sfnt_off000112f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F0 10288 bytes
SHA-256: 229c12c9f7d10ed0ce5236c29ad1515aeb6ea96c8647e3a0e33f1990d5a1fe0e

Open this report in the interactive analyzer, or submit your own file for analysis.