Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd1497ec40d47d6…

MALICIOUS

PDF

87.1 KB Created: 2021-08-15 12:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e83b52d563f4af7267bf2f90974cfb47 SHA-1: ddaf4e59da01dbf38672fb5dff32e4891c1c4172 SHA-256: 2dd1497ec40d47d66ef2c4dae252c011c046ee16f798609af9ee354bae663152
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF.

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://smidgel.ru/uplcv?utm_term=my+talking+angela+android+oyun+club+indir PDF link annotation
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/0acb2308825c67ec00016fbcdcb78f31/94915610226.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/vudamifovipavo.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/47778710488.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/41477156418.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/taxevesixakupugawetas.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/280406444044.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/92603616439.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/1095275702.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff914774990---81448858499.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b172017d779---60961181499.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/venuzezadexumufofu.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d947ecd12---baxibewuvabijijuweva.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/koxelotunibelulavidanoza.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e821e06acd9---71578468445.pdfIn PDF document text
    • http://debden.org/userfiles/file/bedinumixigutazop.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/dowadode.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/067c1419185c63a64ec6b3b4807cf3e4/3194933683.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078e5287f7ee---larepumezu.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/kopipidawonixu.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/96dddff06ca86c6a3aea7282bf95ebb3/dufodufizibuneb.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/488e74fa88a838318fc66929cda9c9a4/sekelejopobip.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/26455233126.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/37a0abce7bfe6c222a7829ea54a8ba00/30388125070.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160e497d45d79a---fupomuvinobi.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_off0000f029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF029 17348 bytes
SHA-256: 6e0ed70aba1615b816c0e8364991cd6af6c09605402d859bfac95db73147bef4
font_01_sfnt_off00011d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6B 10816 bytes
SHA-256: 53936e0bdd849f38bf326f5b176a168fa1f49b0f58a74a8f512b952f8c95e045
font_02_sfnt_off00013646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13646 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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