Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e22f9a6f3a90b11…

MALICIOUS

PDF

80.8 KB Created: 2021-09-02 16:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 567bcb41de2253f5fe6bb8c99abc4437 SHA-1: 52ffeb642ce1eafee85416dbf18cd0ddce1f645a SHA-256: 0e22f9a6f3a90b11f4f5a8f483f4aeb2474630a28f90d5a8e5e5925f804014cf
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or SEO poisoning attack. The embedded URLs, while some are marked benign, contribute to the overall pattern of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://triangle-electronics.com/assets/userfiles/file/fumiloxodudov.pdf In PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210805_63590FE2E3A3202B.pdfIn PDF document text
    • http://mosjob.ru/images/file/91873286764.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/2900972346.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/bogigenevadabirodox.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/munesumetozarorawunadunu.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/juxufatakerufod.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/nezepipomabejasukaro.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/43970897985.pdfIn PDF document text
    • http://scarpatti.com/files/foririfazinudodapixemata.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/nifaleliwep.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/3992665698.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/12640251819.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6e9acf941---lefokubunuwogafisufine.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/22424721765.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/jaaveq0745n4cvp1fe980eirvq/nelixuxi.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/libapefisemowagoderagiv.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/db01bd54dbe3a875a75b074ec0f44459/dodumuxogizajisivesavoxe.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8e970f78b---mokukaxe.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/63676059582.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/xibejoxolulojiwusuro.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/jekirupopasiwavu.pdfIn PDF document text
    • https://parfumzone.ro/files/file/likavavosogebefudozufomof.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/2fe747b7417368fc42a9652469960935/30881689782.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/60024445846.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/ferawogerevajatipesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=zaburzenia+psychiczne+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_off0000d949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD949 10832 bytes
SHA-256: 079d13e549749c7c95bff2c1925679928e0cea8717eae9a47951130fdf5222f8
font_01_sfnt_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A19 17344 bytes
SHA-256: 45bd029ae6fbb6e81bc36d7d610c61c28fac916169a9f726ae5e990f433ac91f

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