Malicious PDF — malware analysis report

Static analysis result for SHA-256 9615eb7ad9feca76…

MALICIOUS

PDF

81.8 KB Created: 2021-08-20 02:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d43314e6c793eae15f7270494ac6b4b9 SHA-1: c0d8a77f66ca29bcfe55940f2514ed7ca45eea0b SHA-256: 9615eb7ad9feca76ad52f058b6e889f8fbae1861885d089a676e7a404f194567
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9430

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 https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aa1472ef1---21274764279.pdf In PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078f8492574f---16172188425.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/riruba.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/relilovazoxiwef.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/68883003720.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c62a4896098---ginujurenesukutetepo.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160819b1382838---mavogesan.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1d17b06f4---fibesegokunegilaze.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/96095982654.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/56d07f4cd8cecf2ecaf6fa119a2bdcab/79694091536.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/nutuzuwewiweladejiju.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/loperutoretolorujawuv.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/af8533629327a2c0df9dff9ba787e88d/ketobujoripejamovu.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607937feb215a---72381026739.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/69241496004.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/16030176392.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082362f436d2---galetedi.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/67572660607.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210729_41D444DD953D7115.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ea0a0da00---44341526722.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/11176159368.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/03cb3bce23576f6d0b5473618a9f4845/96581124187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+greatest+salesman+in+the+world+pdf+freePDF link annotation
    • 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_off0000e30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 17428 bytes
SHA-256: e26742e58343d371cd9fe159bea8ae5bf2a870bb2d0b9405410c7012c21873d4
font_01_sfnt_off000110e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E0 10992 bytes
SHA-256: 1b44dbf58a1573e03868e30f811d053e3d0b0a33bf5503f8882d26036c61f341
font_02_sfnt_off00012a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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