Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f69590abca528b6…

MALICIOUS

PDF

74.1 KB Created: 2021-05-15 06:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2539fe5a4c8312535bfdc4fcc94075f2 SHA-1: 73216f19b9d1ddd6df3f84e9c31da11136f670a5 SHA-256: 2f69590abca528b62bd440c19c90035da224419786bf9bea0605e57a45331dd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous links to compromised WordPress sites and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The embedded URLs, such as 'https://cructi.ru/uplcv?utm_term=astrology+answers+tarot+reading', are likely used to lure victims under the guise of providing astrology or tarot readings, which is a common phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://cructi.ru/uplcv?utm_term=astrology+answers+tarot+reading
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800042f1261---nimogixuzovegadonibet.pdf
    • https://africanresearchcenter.com/userfiles/file/vepefukopaw.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/ofo3l3ttvn6nbe21uaqe45aoe6/87616916048.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/3254022a32dfab22066e9ae8f0663a4d/33218854452.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609695e807b2c---mupagokuzazawor.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/b6c881d0a9c8979b81b6106ddd96dbd6/86455519379.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724c4d6f85f---27408504402.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e35f5dbc48---5399972170.pdf
    • http://pwr-tech.ru/userfiles/file/relubuzizenev.pdf
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/a89ec4e4f16a0502c7fd83c82c0edcf0/31180792681.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b923190a58b1c9c2112fcea86c1f113e/80341361888.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087c9b1ed36c---mamemuwiborenusiwuwo.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d121a447e8---40990232299.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987c24cb055---76579491256.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608251e712044---10591123908.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b48ae1e98c1665f678f2db75750b1c41/xunipenesusufamirerasov.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/9df9dca8c7112130bda933764f085454/galonenofexijetuwosik.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099be26ab83d---xuwovif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d935.bin
9b3accd379b57c2d2c1345a31ef0b4aab26b7b7ab57dcbb3480d4fa1a145be0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 4964 bytes
font_01_sfnt_off0000ea34.bin
f89962d6b5c9c3c382d5b4f97dd68b3c93bb30b2c540b55cc9db6e0471278163
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA34 10312 bytes
font_02_sfnt_off00010d6c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6C 4324 bytes