Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2dd87b08a8888e…

MALICIOUS

PDF

65.4 KB Created: 2021-09-05 13:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b76973dc74c62a06191f460567a2a1c4 SHA-1: 2f288c6bd70e3a86d4f6aded7cd2865658ac45c2 SHA-256: 0b2dd87b08a8888e2fa6fe4cab25e070b150b67d045e76be83bc253da3e6d8eb
154 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable domains. These links are likely intended to lead users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5438

Heuristics 5

  • 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
  • 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://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3943d5062664802510a48b3562d4fb27/rovajejonepebaxil.pdf In PDF document text
    • http://zulassung4you.de/bilder/file/vemideruluwenanumeruzi.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/55698479145.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/sategufuxujot.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/8b81fd55911f87cd6bbe699dc35e4973/bitalibiwozuxagulujaju.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/27480753716.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb22fbfaf2---56008855404.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/3894451052.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/4a613768783602b7e78713ddc9ee81a2/1609219776.pdfIn PDF document text
    • http://abpaluso.com/upload/file/41427248180.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/jelozin.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/dep9kqe793bcj6olqsg1g6e234/mimefebodid.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/2a0c5a805cbd76b9a6a765a2d1798f17/midisatekuvejikuwovuzude.pdfIn PDF document text
    • http://regcureguide.com/files/files/38866167517.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/nobinulepejimubekesiduzit.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/firizo.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/rewivetipezij.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/35552029171.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/xalipinisugijalolisozi.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/ruxozapoleseni.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/gugavewuruxaj.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e104d8a6204---634003881.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/zofagomibuxigebizetarumat.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/97f5bc90b0399af059562bdeaf644b8c/wejemitibunewifo.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/dipepadiregakufodolox.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14827ead56---16251146309.pdfIn PDF document text
    • http://apnorajasthan.net/userfiles/file/badapanerajula.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=applescript+tutorial+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C2 17484 bytes
SHA-256: 335017fe728412e22a454e3bd3477d88a412bd11c4c799d05098b4f0ff466c02