Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab12ad75dbb3200…

MALICIOUS

PDF

201.0 KB Created: 2021-08-20 21:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 85e431ed82abd6c944fa8618d60d7c7e SHA-1: 8d5ed239818fa6c6c5781a11c929543f18b227c0 SHA-256: 0ab12ad75dbb320012c634ecf97ac233e5f3ef8e84733f86ec0dd015c226f54e
126 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 0.9613

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://drafthe.ru/uplcv?utm_term=libro+trombly+terapia+ocupacional+pdf PDF link annotation
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71c59e06ad---mozonolavakedumetizero.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/latajumugova.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075fb211628b---23433758463.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607230b45b4fb---80271419875.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21f0580071---nopinapefoxot.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/gosowebinedogoz.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611a1b62b83d8---41333554917.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/borusizalekukuwuvi.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/00d38f0844a9cc5b6423d9b605f96318/92467669967.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aff9ffb6d10---giginatamomeletovi.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/bilunoxexa.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/xovatozobil.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/59843002186.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/48070920242.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/6692201106.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/bbs5cd0d13tdbf7d2u5eqpvcri/3533487105.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/katopukovavukakij.pdfIn PDF document text
    • http://dolupin.com/calisma2/files/uploads/xusimamerizanoru.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/45295105398.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/77ba18ca23037785b5cac5d9c66b2507/11381008226.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/obhfgof4e6vaj0oeiapij1793c/82054821528.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/56580612990.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/24584585841.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16117a7ce06242---xepifipilov.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fec600dd7c---4116778683.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/diralaxuxevelazokanil.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0002aac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AAC4 10924 bytes
SHA-256: df5d6e3845d98220ca3b0d18872a6da5a29c0d12271ac9d939dc86851d00b2c1
font_01_sfnt_off0002c3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C3D8 23048 bytes
SHA-256: 2ba4d56d5f3e7f91d52c3f66ffd3d7acff31419f3517de70466fb21517afef8f
font_02_sfnt_off0002fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1