Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe268b2949f6e70a…

MALICIOUS

PDF

82.4 KB Created: 2021-09-14 06:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b1d7f33a98354972d9deb1c61cc74160 SHA-1: 903a4c8e13289217a131882812080629bd32663f SHA-256: fe268b2949f6e70a93cc15f1bd89ac1c39b898d2474bfb1dd1e4e0791069d05b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malware or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://smidgel.ru/uplcv?utm_term=download+dragon+ball+legends+apk PDF link annotation
    • https://stotex.rs/files/wubijivabuwavekudex.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/mojovinugemuvarebibopafi.pdfIn PDF document text
    • http://esangsok.com/upfile/files/bolifimefok.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/vijokivine.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/sifenokizimirofu.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343a609a7cc---worikuteburojezunutiz.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/sofuvekudipeteliruwelop.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/petaloniwoli.pdfIn PDF document text
    • https://timminsrenovations.ca/file/vOjeKHfEPyL6nNEz.pdfIn PDF document text
    • http://speckrepej.com/upload/file/14860627878.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16132f532c2b36---karowovorewamagupafapix.pdfIn PDF document text
    • http://siciny.eu/userfiles/file/juvaluf.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/xegirunojalugopusesox.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/lisagurubogofawisumusid.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/86526094030.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/mosenejaligeso.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/fezopugafikob.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd56b2d42b---vilarulatominotolovilo.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/82027502410.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/41947368324.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210909/210909080802446193ilkgihslmydb.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/56578731057.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/61406616178.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/jajuzorivumumoruwebero.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_off0000db46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB46 18712 bytes
SHA-256: bca7a987b060592950baf5ad23185ae4e92731f834220b23e709e7b7cd9a4669
font_01_sfnt_off00010bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12414 10696 bytes
SHA-256: 71e5c7c62be579ee4dc462bed1e6e1f9dd33e2b8e82d88d72dcfda573d3ce007