Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fa1fcbf835c6fd…

MALICIOUS

PDF

96.5 KB Created: 2021-07-23 08:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 792c6469d6843b9dc47f907f77481a98 SHA-1: bb941e547c0e18374869a0f24edafa245e99d339 SHA-256: 90fa1fcbf835c6fd6c62af4a79bcbc7f0705ceabbd11a51f367468fc5bc6015f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of an advance-fee scam, with heuristics indicating lottery or parcel delivery lures combined with large-value draft/funds wording. Several URLs extracted from the document point to compromised CMS upload storage and disposable hosting, suggesting a distribution infrastructure for malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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
  • 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 http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd683e684e---66194108904.pdf In PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/08pcaokds4oavc5t5regpr4gll/19970453852.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/39343834424.pdfIn PDF document text
    • http://asustainable.com/global/file/1906058804.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160edd3c672819---19200812015.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/16382798996.pdfIn PDF document text
    • http://euro-ex.com/45690432868.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/510524cf2b5ce869ffa9b3c7b4623c41/85800310177.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d4830af09db---44218809441.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062822560871.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160822aa4d4723---16986256730.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/28943694483.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160f389e70aafd---vukutupi.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8ee600e5e---xivunenanurivokifezap.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/15301848459.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29deac30a9---risas.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/13154021472.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7e7d5f1b9---58398929997.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/fudunabejidixuwa.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609307487c103---32936186780.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/kuwibe.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/ninepudepumilezibez.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/gorevorebejak.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/1rfjbr2ktct446hqampi8jbe5b/62753105083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=object+oriented+programming+using+cPDF link annotation
    • 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_off000117a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 16272 bytes
SHA-256: af6981888ac5a1c20e0fe8e0a2341d7724d5330d6f12daa2af041bb22af45825
font_01_sfnt_off000141b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000159cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159CF 11204 bytes
SHA-256: dc7e19b215a93961c9d69121f1dce81dc73b6f52c72c9d1d0f868e81b59bda34