Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea79214e08ca4ab…

MALICIOUS

PDF

89.7 KB Created: 2021-07-24 06:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e25957a401f51f055f04122417fbcf6c SHA-1: caede156d8151bca0bfb2bd1f194c1e8c5b45fe9 SHA-256: 2ea79214e08ca4abdbcb164bc53bbf45ed395cf0159c676814143886ac565968
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://luingpyrex.cz/foto/Image/file/48550207269.pdf In PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16070f12187356---9338035718.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606facaad6660---84849931754.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a9caa3604---firoxijabimuwazebo.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/46863db99dc09890412b00fcbd607cda/42262277589.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/ffkiulmsuu2gm8ln78vm46mft3/69500522842.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/45456789856.pdfIn PDF document text
    • http://pk.mo/userfiles/file/19064701486.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/nituvetibufimelalim.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/2d14d6a340ecbd8cafc89bdc3e0fc328/suvarofenogafuvame.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/7e009874d4b8f3320fbb6fec7bc7d1e8/xavowofanuwovezo.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/93459975653.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/rodusimu.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2ec9c42acf5706cbdf22b389cc276be0/29511204777.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/witolapa.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609865607766e---jabuxidobidasiduposan.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c96e723494e---woronipimaletipute.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/20932206335.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a16af7c61cc---zezuzufuterejemubirinemav.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/94377017685.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/dojibikugadojezimevitidu.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/44217675605.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/dedelana.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5345a190---32687617336.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/nipatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=exerc%C3%ADcios+sobre+propriedades+coligativas+pdfPDF 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_off0000f122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF122 11044 bytes
SHA-256: d12fac8ab78e29454ee76d7b060175775751ab00d89baf8994808aa7abd2d930
font_01_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 20660 bytes
SHA-256: a5ff50f796cc2a8ca4b649bed6b5e9eab72a12d2539af9a41435b2ca1b4e549a
font_02_sfnt_off00013dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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