Malicious PDF — malware analysis report

Static analysis result for SHA-256 5619d0277cc52a57…

MALICIOUS

PDF

79.6 KB Created: 2021-06-29 04:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9dd29400f282fca39897b801de91bbf8 SHA-1: 750c72fce17d9ef548b9f1ff6d5b882cbcfc5998 SHA-256: 5619d0277cc52a57545a9a8f539502f78b097312e9297fc386c10fd65ff52dec
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an external URI pointing to 'catamma.ru', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure itself does not contain readable content, suggesting it's designed to exploit vulnerabilities or deliver a payload via the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=in+sampling+without+replacement+a+sampling+unit+can+be+selected
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c7505479cdf---59785306040.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/3a33d99f87f62aba1eea66d14478b030/62297267518.pdf
    • http://anipetkingdom.com/webroot/img/files/vosarekuluvatupukuwo.pdf
    • http://comlark.ru/userfiles/files/pitatiwa.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/71bb3217ff92ba120b42da94e72849e9/zawifuzan.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21fc0a3e36---zakasozikigovibo.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e3fd534ac---26164265254.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608d296134e3d---munurabudivalo.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/d8b112ec887821068f415f7f501ad79f/lekavubunok.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87560886265.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b620de8bd---wezabinijafixubomutim.pdf
    • http://merwepizza.com/upload/file/4340857093.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858aca9abd0---40372060264.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc8d84dc8---79335827268.pdf
    • https://varbackaforskola.se/ckfinder/userfiles/files/radalow.pdf
    • http://vhshf.de/File/41202016838.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/vm2fu0816d1e9ttn6cnoo6e6j0/33214877376.pdf
    • http://childconnect.com/swi/fckfiles//file/79927182741.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a443a345eee---jovutofum.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5329bd252---25109127980.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/2e65183a4bb737bec751c21066117f26/62727843619.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/cf2ac8a7af2800a9845effb11d34bf0d/20094604325.pdf
    • http://thunderstar.cn/userfiles/file/20210519130942802883066.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160952f2c2551b---72676952739.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074371302f97---96925149836.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_off0000d3b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B6 16792 bytes
font_01_sfnt_off0000ebcd.bin
305db20c1611ebbff2484c456e4ddd21953283a028b6f0b6bae3c547b527fc6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 11236 bytes
font_02_sfnt_off00010587.bin
b852a9352c0f574573eddd139d0c1b45fc63c752665f2985c3fe24360848e5cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10587 16524 bytes

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