Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0220040b68643f…

MALICIOUS

PDF

96.0 KB Created: 2021-08-12 10:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 412a2221bc466813f8c14307b3569a7e SHA-1: 45a1f1550892ce6e2235217b04ceb759859cb3a6 SHA-256: 4f0220040b68643f003e4b9c7de4792afffeae231ebb5628ffe7fac16f69ab4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5818

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 https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/3c58ca0083bc2d71033d84551a53c9d0/fodomefof.pdf In PDF document text
    • http://abwlanham.com/uploads/files/towuweruwazutuzur.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/nudifosenozaduwu.pdfIn PDF document text
    • http://edwardnugent.com/userfiles/files/28000297098.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/99137427403.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f539800018---45727404448.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/37726842604.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/26616054031.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/d72d4f02af2c6e8adb26ba7e6d2efd06/pedemu.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/5884642333.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/i0lkvip8l5653garfco1bcil3v/mesosazenexenosifalojo.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/71622320487.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/93434431360ff6f8a1193a.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c431df0c6ef---56514134054.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/tonupi.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/jomafejerozuvoxubek.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf85247722---9556351972.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/rugusidexinunedipi.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/3374752826.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086c47b6a8e5---bapigafedopikat.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee39348c98---pagijekikadokebovidike.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/figikunisuvoxilimigom.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5d2f256396---tuwex.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/purepisir.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/65911429050.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6f7b646bd---56098882064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=let%27s+go+pikachu+mystery+gift+codes+redditPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11415 18252 bytes
SHA-256: 4f9f0c4fa1efea61fe66eabd86fdd276ee113a0e94fc804833924bd501fd67d7
font_01_sfnt_off0001439e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439E 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
font_02_sfnt_off00015910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15910 11212 bytes
SHA-256: 33354c87ad5aa257498413872c80ae64e41382d726ccee9c0ac0f7b247c35aed