Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b2201c9e03314d…

MALICIOUS

PDF

72.4 KB Created: 2021-06-21 12:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f75ba5087cf61910bf8c9aaffa692080 SHA-1: b8dacdaece6f327ba688e9721b4b627b90bc8e02 SHA-256: 62b2201c9e03314da9177ea36858fe821aefdc31bb19ef95f13c48f27391cde4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to compromised WordPress upload storage locations. The document's content, though heavily obfuscated, appears to be a lure for a diet plan, aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8006

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.
  • 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://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9afc00f7df---88776490567.pdf In PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/81c62a76fda970fe6400a0216bb9bfaf/linarowaxenexutew.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/wibezafotopagagorilux.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/8ee1102c68eea1c68e83b7f13b38c79c/famumexubuwak.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079538174c4c---rogebumenanuxeluwejukejiv.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d50f15b6a2---nubiwakepigibar.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/064e6caddfd8db8991d681df80bf7eea/xazawinojonafet.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609964fb28f56---jogepasove.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd09baaff6---5784974418.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ff936cfe7abd1437cdb8a8baf5593b8a/3160556014.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210602100346.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/1479ed60aa5108d49608dd8ff1bcdb27/12650561388.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/25659700808.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/famukidow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=autophagy+diet+plan+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7A 5000 bytes
SHA-256: c5651044f22f3cb0a91c63e9e4f6c433ce07873abb2c50545fa325aa25808fba

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