Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbbc8b31ad465c4…

MALICIOUS

PDF

65.1 KB Created: 2021-09-16 04:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e58562acb908471c99a19ef241dc9e3e SHA-1: 55cbf1ba2925519bd3e1a597fc920ee6cafa93b1 SHA-256: bcbbc8b31ad465c4d44b536c7a7c885777b61b1d9d05d140632f3e3128356aed
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was detected by ClamAV as a phishing trojan. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, disguised as a gift card code generator. The presence of multiple external URIs and a link farm suggests an attempt to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3962

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://securitydm.net/slicice/file/64721838547.pdf In PDF document text
    • http://immobilieninvestors.de/userfiles/file/xotivap.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/wajowagasexu.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/kevepoxixo.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/83900275400.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/mebazivuzusavizevejuju.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/lawesunisomojiwarawajefe.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/80260799315.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/68652020576.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/41837635603.pdfIn PDF document text
    • https://laznia-radom.pl/userfiles/file/pobifumepijag.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/77776997798.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/bebogiliji.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/wubadakirufe.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/68491462212.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/a6d6946aaab9d2e5ce3f96e5472fdd64/vujakiginogajebanumup.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce4c806af1---vimorarejilusoxojawokax.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/lixatoxeme.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/98645961483.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/81224519487.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/18031887105.pdfIn PDF document text
    • http://btfa.tw/upload/files/soxolugerozaxepe.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/poposerad.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/tatolanobuto.pdfIn PDF document text
    • http://househouse.it/userfiles/files/konewol.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/3128f4c0372a48e7b28e93c7d297c898/87172205391.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=amazon+gift+card+code+generator+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD295 10884 bytes
SHA-256: 7014184c435d276b725cdfd9a1f93f40a4e4c1c8205edd00dd96f2e98ddaae33
font_01_sfnt_off0000eb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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