Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a9812debd57844…

MALICIOUS

PDF

80.3 KB Created: 2021-08-17 04:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c2f78b6ee5ad94c9796d5e841550cd22 SHA-1: a51c38d447ef4dfae15699f87f0d56ccc4aa9f6d SHA-256: 69a9812debd57844749f36d076000e77d6458f05d92d1f01f53252db28c10176
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests the primary attack vector is directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://doanekeyes.com/userfiles/docs/8214664757.pdf In PDF document text
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/velesetagipil.pdfIn PDF document text
    • http://belniig.by/public/file/webekanegi.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/tirazepogoxok.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed5c60decf---jusadilutikiton.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160948d9044768---36103851482.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e6ec9657a---62673699337.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dumojonusik.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/12128893823.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/gerawovuwotajekedizivov.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a392200c252---tikifegizakajufirutuzin.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/famesena.pdfIn PDF document text
    • http://yjccnc.com/upload/files/87994440980.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/paxumosurokelikevisus.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/14991125419.pdfIn PDF document text
    • https://spacio.hk/attachment/file/nadawuzizo.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/95793744414.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9d27ad7ac---57732556410.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/6bba0929ba1873e4bbfac16b73744ae4/melavigedejulifufa.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/62167323608.pdfIn PDF document text
    • https://led7.ru/file/daxivofexin.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/b921b95c4b516e18b5429ef11420e434/nijuweka.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/4409832538.pdfIn PDF document text
    • https://sites.google.cIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+make+command+block+teleport+you+pePDF 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_off0000c914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC914 10936 bytes
SHA-256: cf8eabdf1693171d925299bd1a1cdaa6731bd986edf2596cc51cddfea1ff4dd4
font_01_sfnt_off0000e22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22F 25156 bytes
SHA-256: 00f1909d29cf33f665c484e8a8a0296d715c244040d634fa4aec0069bb0949b8
font_02_sfnt_off00011887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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