Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eee7226702adb06…

MALICIOUS

PDF

80.1 KB Created: 2021-08-06 11:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cbd031d3620986caf0dfd84ee7464b6a SHA-1: 45b63cd4f4de0099a7065f8456416652c68d0e3c SHA-256: 5eee7226702adb06e56c7dbccab5446da9af66bcf245b8688bed3838eac8f324
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads, suggesting it functions as a link farm to distribute malicious content or phish for credentials. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf3fc11274---ruxoxumanem.pdf In PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087892f945e7---bikenafosag.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/38416091737.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/wegelijaj.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/8nlmfciae1p7vtpo5o93p97p3d/16910042084.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/75318841905.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/lumuxilawaxuxikizurowinap.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/urcfngegco8nl3s8hftu588451/22926050471.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7794c247b7---lesupepunowet.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/i9bm15egv0tu94vvfis1pn7dp3/23093248604.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/ced734559083d18a662f489462f069dc/voxexiturojasaliworenuta.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/wulel.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/21120522539.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16076ccb16f23f---dufazekoliwezoxofozot.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/dasodivugapoxob.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/1lfoshfkois9jkqsq4a07asdee/jajozapogoxujuvovakoruf.pdfIn PDF document text
    • http://51www.org/uploadfile/file/2a38500b41ee2c0b6bf46f77e8a4f0fe.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da86a11766c---xijemipewaxatepesadug.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/98435ee484a72a0fadc73b6b8120599f/ligeledofajerokem.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/jovakixebilutaz.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bad3994fbca---xusowenabadatagozu.pdfIn PDF document text
    • http://ghefoot.com/fckeditor_userfiles/file/16934200540.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086299604dfd---jotufa.pdfIn PDF document text
    • http://domplus.su/userfiles/files/87633834881.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/kozut.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/8134001930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=descargar+activador+de+office+2013+por+megaPDF 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_off0000d1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AE 17444 bytes
SHA-256: 2a438150711f26398d1dc1282d99d2eb5516db9e52ae8447558e862225f34cb5
font_01_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 11344 bytes
SHA-256: a34ce5dab3871bcae1e674366b50afc5270f72563df1720c74dae25c7e8fb668
font_02_sfnt_off000118f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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