Malicious PDF — malware analysis report

Static analysis result for SHA-256 46dba5a32a923ada…

MALICIOUS

PDF

80.9 KB Created: 2021-08-05 07:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 31f0cbcc8b45b7d105b0b976ad458f91 SHA-1: 53a5b389aef48b84e068ec52f7fae9106ef430b6 SHA-256: 46dba5a32a923adab0a46a275cc7b3e6c44b0a4f91027db0b7fc6e37d093c483
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://floridainvestment.cz/files/file/torupoxexipavonukevog.pdf In PDF document text
    • http://chonburi33.com/userfiles/file/91043769573.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a11d55762---84816888359.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/da8f03bf28d800b9ffd781ff9b76864d/19669514868.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/71913392370.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/6083678791.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/h9bv8cmo1kq370emrd0j7kg2m8/tixomivovabetenedod.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/wanexasa.pdfIn PDF document text
    • http://juentai.com/userfiles/files/jejojoxigopukavabizax.pdfIn PDF document text
    • http://transfertrolley.cn/d/files/sivelomenazukeme.pdfIn PDF document text
    • http://wshs67rocks.com/clients/9/94/942520bde836a0b401740df6f3d23d35/File/lowewidixuxetike.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/80944044744.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/681e06b21cad0bc6e28abb626fbf89dc/66770576407.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/51150747887.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210726_CA24016A9B5E2BAE.pdfIn PDF document text
    • https://alternatifhosting.com/calisma2/files/uploads/pivob.pdfIn PDF document text
    • http://adveotec.com/img/file/fokevurejulikutoz.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607846ee9f1e3---vavijimuxazovarot.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/jitefegagoditidewenevale.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c84f6e120---misekitajopitoxobubula.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/36814730387.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/gugikuzikapon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=choral+music+repertoire+listsPDF 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_off0000d82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82B 10668 bytes
SHA-256: d4d2239091a524ebb0d9c91db9d1f58b41ba4ef4d0ae6b77ec290d919039d8c0
font_01_sfnt_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BB 17368 bytes
SHA-256: 906ebc1e5169f82e7c44813475c1fb94edb2a9141bcad4f9e9d4912cff2a6bbe

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