Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cb1d2fa56a96f5…

MALICIOUS

PDF

77.3 KB Created: 2021-09-02 12:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e54b26e152148dec15c5d40dc5ad57ce SHA-1: 82911cfe0fa624e89a883eb68b4fe9de9553d633 SHA-256: 09cb1d2fa56a96f50c6177050e4f798bab37c8123ecac2a03a9967630037c46a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or redirection mechanism. The presence of external URIs and a link farm heuristic points towards an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://driver-jazda.pl/upload/file/70045561321.pdf In PDF document text
    • http://cartopack.be/Images/file/venevoridarirasugatukozo.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0aaca6edebfe81eb1069f6fe32a28f72/zijoxiravijonetaxafobi.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/50205816079.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/83167424342.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/e7cfb1923b0f01c497b24568264739b0/86582458925.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/98290853595.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/88723191953.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/4cr9mg2hi26b5kb9es638v4l43/69050411532.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c112c12d9fa---kamorirakiri.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/68978135242.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/22185693677.pdfIn PDF document text
    • http://contelex.it/userfiles/files/seroxadikux.pdfIn PDF document text
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/99946931479.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/tafozufo.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160990997dd71d---gujapokuxofonaz.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/5a000ee74d98affeb0565b9dc7cf2fda/miwoboxakafeti.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d89f55a976---xodulidaloxex.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a118b960af9---85241858537.pdfIn PDF document text
    • https://melz-feu.ru/upload/55166717135.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/62576235708.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/26914073462.pdfIn PDF document text
    • http://scarpatti.com/files/xodedipevujogitobaguwikez.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/37ed0b83b5c96880bd49707918295d1b/71371594712.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=kardong+vertebrates+comparative+anatomy+function+evolution+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_off0000c539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC539 11376 bytes
SHA-256: c26580bd6036ffe9a76b9cf4b09ff223e057eccd2450120e8c3dd83729c550ef
font_01_sfnt_off0000df9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9E 18148 bytes
SHA-256: 3e33a6c6f548a75115a47d28f5a8f50d3c1e68358790533ba0efbd1939088092
font_02_sfnt_off00010e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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