Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbb3f32c3a40e60…

MALICIOUS

PDF

76.0 KB Created: 2021-09-18 20:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: faffe0bff6eabdb2e70f50de9cded7be SHA-1: 757f67d6dd5a692691e6b7d6e350cfea2a1bdd14 SHA-256: 2dbb3f32c3a40e604b55bad738d03a9e17c38f802e3ff335dab33823f956506d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous external URLs, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm on disposable hosting. The primary function appears to be directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=db+adapter+in+android PDF link annotation
    • http://cuacuonnhaxuongbinhduong.com/upload/files/wafubedozi.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jipusefusamev.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/vafotejojafekiwunan.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449c9166e76---rolodib.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/lonoporuxodizokepixu.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16145b286235c0---55859424744.pdfIn PDF document text
    • http://pasted-radio.de/web/files/69446664479.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/furipov.pdfIn PDF document text
    • https://sassanoproperties.com/FCKeditor/file/674274366.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/gisozoxatimarijulo.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/77816954297.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/161408c157fee2---79720412331.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/37750605264.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/34773677177.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/xuvapugiwupavo.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/vedawogagozajetevob.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/kegejegupinebuzofewapat.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/fobeberodumefijize.pdfIn PDF document text
    • http://adamex.ukrkarta.ua/fckeditor/userfiles/file/milawus.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/95936866709.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/gesozuw.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/dufofaxidonumixiguvik.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210912_B7D2775DF2CCAB44.pdfIn PDF document text
    • http://michael-dhom.com/webseiten/file/burujifujorowajeki.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e91493a91---vusivabura.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/dadebokerulomusapufimume.pdfIn PDF document text
    • 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_off0000c400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC400 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC12 17976 bytes
SHA-256: 4a6d6d6edf84ec41a5838c614ecdf644274c74ffdfb80c9672593d2101057ede
font_02_sfnt_off00010b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B04 10312 bytes
SHA-256: 087e5eeeb8daffd9e661dc7370fa05371a454fdba3cdbcd167ff4bfbde2867ed

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