Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3ad79a202c5012…

MALICIOUS

PDF

76.4 KB Created: 2021-09-02 05:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e6767516c7e0d2f22190af7896637e41 SHA-1: 8e5fd626f87a4eaf8cb1acbd09c3ff248feea2a5 SHA-256: 3a3ad79a202c50124090165c7d8d6a12096133b0d86f46030cafedda42b887b9
156 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or employs social engineering. The PDF contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of multiple unknown URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://insidethedigitaltrend.biz/userfiles/file/jubujatamizurabudo.pdf In PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/nisaburir.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/fafegorinuzobatuperofepa.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcafa85b10a---domerugipelelafumom.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba239fa3035---pobumidumapivixomami.pdfIn PDF document text
    • http://soundupgrade.nl/site/data/ws/files/90128372826.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a365311e4e4---dixepinunemigid.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/vulejifofasuxozuwugoxedol.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/womare.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021062602044173499.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/46928681041.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/1f8181ae8139865adb6a99787d780989/rigorazoraxanipadan.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/76174570265.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e57a45a668a---99497289124.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/16/file/20210516_115607_108.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/081306237509.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160781b2d34ddd---madajujelabiwexud.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bb29c5f06---kevorurimomazadetinege.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/lizenugozufeposolul.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfda2e7230---63438265270.pdfIn PDF document text
    • http://ccl-ciecie.pl/userfiles/file/49821375568.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/22694924141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=north+greenwich+cable+carPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CF 17156 bytes
SHA-256: 50ca2bfcfc1b4004575f86934fc3bf1824ed8b99a70900b4adca0240367dcfc0
font_01_sfnt_off0000f38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38C 10544 bytes
SHA-256: 37f556f3606b58e5c35cddd78537e599f056cd5b9100051be27d0fbb770fb225
font_02_sfnt_off00010b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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