Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a9b207eab0e84b…

MALICIOUS

PDF

90.9 KB Created: 2021-06-29 21:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03fc8dbe1763a1b58ef47581d19f01cd SHA-1: ac28963ec7ad702855bf6d6b8046fe08b084cdb6 SHA-256: b0a9b207eab0e84b090cce2ab4b9ec2ba1d702621941de93df802312bfbe8cbf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The presence of numerous embedded URLs, many pointing to PDF files hosted on compromised CMS uploads, suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://queure.ru/uplcv?utm_term=boy+to+girl+makeover+transformation
    • http://bawaconstructions.com/editorData/file/wapuvegevikonuvokovore.pdf
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/kimevizodumifusunu.pdf
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/tabexawegowixuraxe.pdf
    • https://ajitcoatings.com/uploads/ferowuxipibaxefa.pdf
    • http://poorclarescork.ie/images/60522473653.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085bdd1bf46b---paxalator.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c6d995a9b---61480996681.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef7a76f7e2---lirupebi.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160719f7da26a7---81089642131.pdf
    • http://technocom.pl/editor/file/penipidi.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/bcgqmtna6ksbbbcukl2engi6p9/nakeduzilodumelirinor.pdf
    • http://holzbau-napetschnig.at/22333576694.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/vutepoto.pdf
    • http://szpk.hu/_user/file/45372970732.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/259f5ac016cb50e1b4bbbb762e80de9d/32816007532.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160890dd47f6ad---99119009981.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d466109b8e---bozesoli.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/3d284ef02fdbb0c9fc24b011aba49997/ninebaripa.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa96426fef4---waneruferalomalunosomufok.pdf
    • http://zulassungsservice4you.de/bilder/file/80892457073.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed62aec1cb---domamamigin.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ee9725e71---18639491482.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df329a38e0---kanatadulad.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e645.bin
771df007630316d9e8e1f1293484a70ae786a4272b8e4aba78356f297ae946e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE645 10884 bytes
font_01_sfnt_off0000ff7f.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7F 16164 bytes
font_02_sfnt_off000114f1.bin
6bd8d8b279cde013c228ae035898393c37b25530078eca2b88ad520e14b18aa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114F1 17928 bytes
font_03_sfnt_off0001440a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1440A 16792 bytes

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