Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30a88064d66191c…

MALICIOUS

PDF

88.6 KB Created: 2021-09-06 21:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 73e81ff2af4a660e811d752e154a2c94 SHA-1: f1ea4f05235ae4e00e3a0d9fc07f80029e58f2b2 SHA-256: a30a88064d66191cd090c322d68c18a31080aa919273306082cfa90f244c4d18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://pixomot.ru/uplcv?utm_term=kangaroo+joey+pump+operating+manual PDF link annotation
    • http://poolprotektor.com/userfiles/file/19010629369.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5ce1ff137c---votusojixofubuvawo.pdfIn PDF document text
    • https://nevisnews.com/userfiles/62669634743.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609e13756eef3---38848678275.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c5766aebf93---lewofuzosox.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/17482201776.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/72711897935.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/borekapimi.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/38019829411.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/rolukopuw.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/bupezimogatofitewuk.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eea616df7---2982298163.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/pakaku.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/d5a16f44e725c58c1cbe879fcc329e5a/kukifosukinopesanatilini.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161211b83d4266---25976500667.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/159c4cdf01d2c8dd351bfe9dfcc3987b/lusetivimijuwutewetuloz.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/24835557058.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/78201562369.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/euev44vho86paac54bgmkttf7o/xalutilumivalonepo.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/0221ab43d059a1b2629543ae6f304460/77656406603.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/cfe0a8c8e7213774662493c2bcb945c7/karuwigas.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/31389463759.pdfIn PDF document text
    • http://yuha.be/_files/file/89760891966.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610761955e9c3---1351131597.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/2i091h1elk0kntds2od0q8sjs9/gupuzezexivifolawitema.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/s6i1cgish2drv2rlv7afs0bs4f/gibolu.pdfIn PDF document text
    • http://pronobile.de/catalog/file/22060512278.pdfIn PDF document text
    • 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_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 10760 bytes
SHA-256: 47ae822aae5f164f6ddb8ca2bdf32b3efc61add3bb83303de323ad19107cfdcb
font_01_sfnt_off00010c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C49 18604 bytes
SHA-256: 7256e0ad9bde46655702b866948d9f4f8d6a21044faca483753068bda9b259b1
font_02_sfnt_off00013c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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