Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3d14564687354f…

MALICIOUS

PDF

86.7 KB Created: 2021-08-17 02:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cc3776fe4a9a4ed1e8a1ff690ac16c69 SHA-1: 7703d859b49a78bfa268d3a00a861234edc85ac9 SHA-256: ce3d14564687354f7e109845e688a70ecf35be309a19dbbc2940ab659fa5a8aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to farm links to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://crysiq.ru/uplcv?utm_term=how+to+see+in+the+spirit+realm+pdf PDF link annotation
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0da4cf1cc---vetawajapu.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/9464507231.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/damerobug.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/66893091020.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/lusopeted.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c046b223596---34923655028.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/muruxozap.pdfIn PDF document text
    • http://bfo-walkforhope.com/clients/e/eb/ebd0efab9cd97e953e90891d9eec7aad/File/pejunasimozu.pdfIn PDF document text
    • http://nfc.soo.jp/file/50795503808.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53b1a78481---vetazesuzizilerog.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881653cc552---39992084159.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/4447513216.pdfIn PDF document text
    • http://miele-service-center.ru/uploads/files/18793999475.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/77d3f3ec3d8dd61f7d2757261d1c3e80/jejonulanutato.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/c214f7845470ac04d976ca772500edd8/70229525223.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/59709880037.pdfIn PDF document text
    • http://unseretochter.com/images/file/95880493764.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/pusijozufaduperelo.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/c31vgqcorq6ej18bccj0vj2lfv/zexilavumarabaj.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///lidenulikibaxabelowobejek.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/kebawusuwujikusopuna.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/407464193.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/rabajasujajusagojogim.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/bemukavomaluzipodovufo.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_off0000f072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 16784 bytes
SHA-256: 9e472a7e82e3ae2e86b0b66b170988be8519b8b287eb27f5bb9fa088563bcc33
font_02_sfnt_off00013406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13406 10840 bytes
SHA-256: 4c134c98d2286df79c46f279c28e3842cc851a0a5068ce6f7d82c03b218c92c8

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