Malicious PDF — malware analysis report

Static analysis result for SHA-256 36006c0c913b5119…

MALICIOUS

PDF

78.7 KB Created: 2021-09-04 21:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f963bb1942476c4d3fa1cceabc85d719 SHA-1: 2359a944069697252bb6592c7ed8da7119151080 SHA-256: 36006c0c913b5119f559fc784907354f798181d500ed12a5fbf6c05eb2596f52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple websites, several of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links on potentially compromised or disposable hosting suggests an attempt to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://sahodayabbsr.com/test/fckeditor/file/52591272736.pdf In PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/au4frjtq231bqd0geb9qbptlh2/45824411614.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/53147425723.pdfIn PDF document text
    • http://cosyromania.com/media/file/niwifajuximodotatepi.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098790579eae---62481912857.pdfIn PDF document text
    • http://cli-kh.com/uploads/files/202108152341124041.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/15966827657.pdfIn PDF document text
    • https://petala.gr/userfiles/file/majovaji.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/f8f073d979b0b6f1cf9a8071bde0b922/givadopenidutukupilaluf.pdfIn PDF document text
    • http://rahwayhigh.com/clients/42761/File/safozuvipesanogukafakunu.pdfIn PDF document text
    • http://newmanclassof1965.com/clients/4/4a/4a7b3a1a0fb21659e68ac19badabb541/File/56884823633.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/godaxupufabudorubifilina.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/43582761981.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/48440810860.pdfIn PDF document text
    • http://bhs1966maui.com/clients/64750/File/pobavivovoxowedum.pdfIn PDF document text
    • http://veivel.com/userfiles/file/kawikinixodapewafuk.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf5b9b07ec---42517087338.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/jiwerawiwifuvuvege.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/jixologipib.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705c169a1d4---gapizumut.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/5601cb3cdcd689d954180a7a35d6ac83/3647057570.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613292bf3535c---89718198174.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202162414026.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pdf+free+download+for+mobile+phonePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB6 10724 bytes
SHA-256: 32a54826002504ec2c91096df94eddd26add46beb945cb2383daa619383f6b2e
font_01_sfnt_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 17388 bytes
SHA-256: 2ebe4d4b8ad6ccc1f30ba289f2957b1438def0c32aa6f049ef8448543c27efc6
font_02_sfnt_off00011473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11473 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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