Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c203fe4efb9ae0e…

MALICIOUS

PDF

70.6 KB Created: 2021-08-21 13:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1df784fbbb8deb1e94d5f1240085a421 SHA-1: be93b15ae01a91781391df38fb02c0c985820776 SHA-256: 9c203fe4efb9ae0e9fccb3dda86f5ccbb86916952d817ebc389c6e49825f5ce0
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. These URLs likely serve as a link farm to redirect users to malicious content or further malware downloads. ClamAV detection and ML classification strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7545

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16089c79b1f747---12567673837.pdf In PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/aa3acb28310e3dac60cb67d9a6bcb459/72283382395.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/wevoj.pdfPDF link annotation
    • https://getracemirates.com/userfiles/files/wagijeko.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/59978552178.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/17095312670.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/6c12e4c3a08929ead4d6b7b06b463caf/30913112532.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/6391879ada6c05b46fb5479b79f0f051/48263115072.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/2dc4272ee996da7d5f3555636ae9c59f/dibowozutidovepumemopi.pdfIn PDF document text
    • http://kgmda.com/upload/files/30164132799.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1d03f08b3---devojarefekilom.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776ce938827---tuxazuboxevodir.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/logigimutemidevoxa.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/ranaxekunav.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/40658489155.pdfIn PDF document text
    • http://dzbnf.com/upload/file///zodage.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc8618432c---41528018859.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/9a6183526cb3b34149202ab84c2487cd/41700326066.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/81598528783.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/fefujagajetukafofug.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5507cac02---sijexatofoxagagidiwij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=opiniones+del+libro+mujeres+que+aman+demasiadoPDF 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_off0000da78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA78 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_01_sfnt_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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