Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc7740167f1ddf4…

MALICIOUS

PDF

62.5 KB Created: 2021-08-29 02:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8d861bffa1fcfec6e645ae2a93ecd085 SHA-1: e6d58a3bbb067214921a3ffc05c03230bf66708c SHA-256: dfc7740167f1ddf4c53e23b9f67184fa59508fe0b56a188bcf2a93f8d6fd5f55
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be redirecting users to potentially malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9069

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://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/45026751678.pdf In PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/2c2c7ef3d992b9204d5314ca83fdc6ba/suzinezel.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/j7vd76e0nbdr67v3kmd74kob51/tutifumerenanimonituwof.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/7814857280.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/60024059705.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/0b172224d5a1db10a9695cd0eb2ab727/wuvagipus.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc7fe82891---lunaxawovew.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/29586404638.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/lunejodumubaz.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/58696398059.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/261009089956.pdfIn PDF document text
    • https://777mto.com/contents//files/runivugenakugekugabizivad.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/581ab1956ade73ddfa14f5c233086115/vilub.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/715a56598d0ee357e35b767070f51c21/26088959110.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f99268a09151755f9ae817069db57fcb/8335573891.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612499fc3d39d---vugizipigatu.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b4b2051ae2750734cd2406bcfeb64429/34602592334.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/988nqta4as3831sd8mt3ccu3av/pidigigilifu.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/16248650886.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8220b2fe5f3db0c258565bfaac71c6aa/80850089169.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/787232116.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/rajodigedezazov.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076956e20458---4692643610.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/puridojojolomobepoj.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/wekikufefev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=beginners+guide+to+learning+japanesePDF 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_off0000d837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD837 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1