Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0757da140081bc…

MALICIOUS

PDF

77.5 KB Created: 2021-09-01 00:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4f271b470603c97d2d65315bb5fc6760 SHA-1: 3ca32bdafe4e57f510e414e9f45dfdf30407da87 SHA-256: 6c0757da140081bcc03af8b6e24dc0cff5b50e6115d60b0d78f0ca855af250a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted, but the presence of embedded URLs and the nature of the link farm strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5345

Heuristics 5

  • 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
  • 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://heninrealty.com/userfiles/files/72091066515.pdf In PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/19613466658.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/84639764158.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/jemavosikagoje.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/sisuporejaxomabinidowono.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/jagasitefuvovedexegegeta.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/77960430753.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/forafevasa.pdfIn PDF document text
    • http://elskenecologie.nl/files/68982442919.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9ebba5ba8---dojobetogefigonad.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///28023884214.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb4cd67232---72318822192.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8485d0d9---fawomakifawuxutemukuxob.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/29376370298.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/29342491139.pdfIn PDF document text
    • https://moolans.com/uploads/files/tuvegitaminebap.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/lowomunonuma.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/78107042857.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/duforawuwa.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/xamegakubelafosurebakuj.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/932752544.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/24629911742.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/100qftodmcfvbqde63dhhel8eo/82976861086.pdfIn PDF document text
    • http://kasargod.net/uploads/file/64651535206.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+gift+of+the+magi+answers+key+pdfPDF 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_off0000f00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00F 11156 bytes
SHA-256: 9e1ca40ca2c008fcbc588ad226e58d546e272b4898ec2bad734e2a226221344a
font_01_sfnt_off000109da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DA 19276 bytes
SHA-256: 2d2074085f5b429e769cec3c8d683b948bac5dc5cd9981ec1e5598ad3d95d1dc

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