Malicious PDF — malware analysis report

Static analysis result for SHA-256 965ca2ac817c64c9…

MALICIOUS

PDF

76.9 KB Created: 2021-07-31 02:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ff18168dde78d7153a78b9aca1076442 SHA-1: c05c765a73f49250c410c4ed5079e89a0f45c5b2 SHA-256: 965ca2ac817c64c9c380eefc0a6be7e5ef0dc0071ad77c7262996658448e2ec0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure and URL patterns are consistent with a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8445

Heuristics 5

  • 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
  • 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://konsultacjenaukowe.eu/Upload/file/75261848232.pdf In PDF document text
    • http://sva-jeanroze.com/xmedia/file/fubifoxavederuw.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823fcf804fe---dididebesogixegumatumapix.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/1429334826.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607792e7a2bb5---lajomafadafugolofajivex.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/nubadewukamagumigutep.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/rijivipizotirilow.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdf22dbe03---rijewup.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84148598313.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/7603650088.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736fec0b198---keravizarofudek.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/fea2cc3fc1e2a5bd5a4bbacbf595bf84/fowowonuzojomesibuvuwega.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9b6db1f4e---tusuxegidokagedizu.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/dp3fjc50nkp46v7ia71bmt1old/lemolototikunabusigenose.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/28389804314.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/63883368455.pdfIn PDF document text
    • http://scro.ru/pic/file/91385662531.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/46352215189.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rolesuwulimazawuripudip.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/96948051555.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/ravanexomezeb.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e9c0747a1---pugodikeragopipox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=is+land+expropriation+without+compensation+legal+in+south+africaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 16944 bytes
SHA-256: 940a583e66edb660a9c0c43be8ffaa2b55eef77881a22bd745db3ce36c437b4a

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