Malicious PDF — malware analysis report

Static analysis result for SHA-256 356f422563f1defd…

MALICIOUS

PDF

80.4 KB Created: 2021-08-06 00:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 33fee22266aad77d3349300b0de45770 SHA-1: 6808665703a03902d4a3ec9cfcbce83bed42d45e SHA-256: 356f422563f1defd790f4cba07a63daa52104831ecbc45bf1757ff566f3fb7f5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, pointing to multiple distinct hosts, some of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing lure or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5399

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bjhtdszdh.com/v15/Upload/file/202151987213916.pdf In PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/19a1e3ca84eaf3a7ff2438b2aead69d2/dibebifotofinenonefik.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/xetukevironurevilenim.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/redozavonevutod.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/7974a2f8fe671404a43f10dae27e82ce/44557868743.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/304601206b63902edc881a6eb06017f2/dugarozisixapap.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/4da78e17888c32e983e3fb6f31e268d0/12080320553.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5449fd2bc7---ditege.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/81352024942.pdfIn PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/74587082907.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/94079932349.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/lagogon.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160843f9bbe304---32762733358.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/a32b2c4717767c5703f311bfd2f3bff6/86216848349.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/97974380526.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/edg1nu1kh9tb095jqibrsk04c9/tifaxabegudenuxexul.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/95646138524.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/73974248008.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/1e21398e40d84000270b629156ea98dd/lifikapanorad.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16073e810b74ae---4798850926.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/diviverek.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/juzigajoru.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/5n41g0duamsagou03mhik1ppj9/zogik.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/e42c0516000d073cbae85236ac70bc6b/mimuxixiporogu.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc5d5b53f---lidazupaluzisiganopamim.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/62604137582.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=nokia+lumia+520+windows+phone+10+updatePDF 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_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 17636 bytes
SHA-256: a87e25301585056f28ef2a8df1c301066b1dab00f51856fccc2edaa56d4ab041
font_01_sfnt_off000119fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FC 11240 bytes
SHA-256: 2a6d5773003d7050689fcd12f1454cabcf6df1560b5cdc38a4eb43a782e42f81

Open this report in the interactive analyzer, or submit your own file for analysis.