Malicious PDF — malware analysis report

Static analysis result for SHA-256 680d3596bfb45cb7…

MALICIOUS

PDF

62.3 KB Created: 2021-09-03 05:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f5cc5cac96707d1082044b3b3445b59a SHA-1: 56f54b8745f831e583fb52a3b56b39579c55d50d SHA-256: 680d3596bfb45cb768dd5bb3337f0db312bca6e078b699c128ea127c61f7bc90
174 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure, including being image-heavy with a click-outward action. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or download further payloads. The file's structure and URL patterns are consistent with common phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5428

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 62 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://appletechsolutions.com/userfiles/file/95468862169.pdf In PDF document text
    • http://uralinteh.com/uploads/files/49020693662.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/radexoridopubinifusavuk.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0746604a4---nikijudavaludideker.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/maserowowaxolilojoromap.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/875d7ff62f3a948c23a3441ac5ac885a/35876523718.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/k7f31g8lvcq2fslh8ushf24pmp/88174872953.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/90570882183.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/kijofijefotatepowas.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/35591223424.pdfIn PDF document text
    • http://373113.linker.tw/files/jenezatigizotenu.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/80900bad932ee0027d49b008a53000b0/36253301636.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/40713070796.pdfIn PDF document text
    • http://vswet.ru/f/90617729519.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092db96cfc90---nikowu.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/98392803011.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/bg9fk2okggvnh19sun2ni9j5b6/12391018697.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/6rnhio73qa0n8vptvgdlfcscir/bodewubi.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160989f47c9978---vikijutakipaneworogew.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160733650b9d46---gexipetodar.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c07f46f2af0---33150322627.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/fosuvadejegowujeme.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/39sb283rn2ohtvg1jb3u2do32l/56380911234.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=measures+of+central+tendency+grouped+data+worksheet+with+answersPDF 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_off0000b33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB33F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB51 13716 bytes
SHA-256: 56798c3e76ea2f3ebd73395d571029a7476521e2ddac788071106086ee1efdb0