Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da85eb5cc2f6948…

MALICIOUS

PDF

85.8 KB Created: 2021-07-13 15:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 97ff2cb692260ca0b8110b898780a568 SHA-1: 8b292ba617c2e3aad469361ec0c8a5817a87edf4 SHA-256: 0da85eb5cc2f694805013b2002e701086b088fa0ac0587a869649140d0706fe4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting domains, likely intended to lure users to malicious sites. The document body is unreadable, but the presence of many external links strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ahcxdq.com/uploads/file/090019538175.pdf In PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/60c084a912e5d91dd8c3e5c52d22cb0d/laxatavunifasakewov.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b42ed34348f---58668493447.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/3908641954.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/13628440723.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/16840419825.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/e67dbc51211b1b2dd923c6317f8eb6a0/66766457800.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/sutodipevomafemop.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/sarigipulegug.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16074a5e2ca2f2---firuxafaw.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/tujijor.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/38b5b6f33fa7b1ce9fdb3e75543f80ea/boganina.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/e8c4f8a59e369ad164edbec088a6b02e/kapojawabexabanenofuruvis.pdfIn PDF document text
    • https://0900107678.com/upload/file/34380001538.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/ceee18b9bb543ce4ab7b28a34983a0ae/vedalijugevixa.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/5401459185e20e53a785dafbd2fe2e33/74419280848.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/8lep3kagm9dlvf95hdtdn0fb7ph7pa85/rixuwosaxurudiwonabas.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160835dcf433d7---46016190318.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079eeb5e1bfd---48369523969.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/tevebinujuwifinuzaf.pdfIn PDF document text
    • http://e-district.org/userfiles/file/difoliminegetugajurapote.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c32db73cbb6---jelavixufosogitazaj.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/supolumefu.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608178f9a68a8---pelujorifemematobex.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae9d0c7153---suzikukanonawunebov.pdfIn PDF document text
    • https://airbays.com/userfiles/file/dasiviboga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=physiotherapy+clinic+near+mePDF 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_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10440 10752 bytes
SHA-256: 9b519a9eb5d53472f13b6e656a1b9ae2776dc5e5208f7d79f31c41f023ba858f
font_02_sfnt_off00011cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD4 17208 bytes
SHA-256: a0eba423b300c2547ff89337568e48d44b592e0fd9e204f7374f1ceeb8fa1fa0

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