Malicious PDF — malware analysis report

Static analysis result for SHA-256 226221c749597b64…

MALICIOUS

PDF

101.1 KB Created: 2021-07-06 18:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c744c2057f2cda6b78a87c8364f9f59c SHA-1: 8b995586842dee9a835e93e4f5afdc378cf3bae4 SHA-256: 226221c749597b644af311c06288e326b595864f130fbd9fe4c96ab10ef32240
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating a likely attempt to redirect users to malicious or phishing websites. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9766

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://krisoc.ru/uplcv?utm_term=aesthetic+writing+copy+paste
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608264f87f8b5---47978345272.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01f035f75---79509347952.pdf
    • https://andrejc.si/files/file/tujutijomevujiwela.pdf
    • https://clinicamanila.com/ckfinder/userfiles/files/genut.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/330b1a248ce65c3393ebeffef30f6f15/lufenagumulemudawopa.pdf
    • https://morabia.fi/images/file/81020165940.pdf
    • http://morard-mcf.fr/data/Files/jobinowuxof.pdf
    • https://ascinfratech.com/clientprojects/trading/file/87789032950.pdf
    • http://maasmartcity.com/userfiles/file/91732535392.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c099a71b977---levikajarifupokoj.pdf
    • http://solarexperten.ch/fckeditor/editor/images/file/39212054889.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/qh27n7bk3094ikube0066r1n6c/dafupewopijetejufojiz.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/1b85df7a2312b14cad981afcac2adb04/novupanemibubidajikijo.pdf
    • http://younewstoday.com/task/userimages/file/82178397777.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f51f16701f---rulewotowerikagik.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/j9m0g3vnc9vmpupnf3a249fp72/6595570642.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/0bdd82badf03133fe5a92fc7114926f9/25852577076.pdf
    • http://mcgrathpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fupat.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a782d4ceb58---50178310048.pdf
    • http://mariamozharova.ru/uploads/files/12217848026.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/bjf4r01c0qlibb17saulrjmec7/80802644111.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec5d7b22db---mawubi.pdf
    • http://eko-inwest.eu/upload/file/14185704221.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb65.bin
159869568627a1660e99237105f87683289ffb581c60024feac6f3f2d6b846b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 18340 bytes
font_01_sfnt_off0001084d.bin
7a9cfc374bd4f6cc5a0d291b0102aac4937dae3da25a1a8f0d1394a4969e01b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084D 22776 bytes
font_02_sfnt_off000144a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144A0 16792 bytes
font_03_sfnt_off00015cb7.bin
e0f3d3b107984ffdb937a06a04241c41694742879224f9dfe9fe7098c982c3e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB7 10788 bytes
font_04_sfnt_off00017578.bin
fb7871d9da2549b30f6408b29da4dcf208a9c7a99ff9ce6fe704e7b49cb11e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17578 1196 bytes
font_05_sfnt_off00017d63.bin
c061ea5a1b35fc292d6b8b2091aa632fa0cbb9fad6333be4b33656a2cb7708f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D63 1696 bytes

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