Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0cd24f4db775fe…

MALICIOUS

PDF

79.7 KB Created: 2021-09-06 19:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63373168b61830a75d12e4b9965b5695 SHA-1: 71466f54c46aa7899e9423ccce1a18a5c7e33191 SHA-256: 6a0cd24f4db775fe74d2b4a794ce10092f978d373635b40f38a5464fe6367f22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ecowaytechnologies.com/ckfinder/userfiles/files/xidubulafilij.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/6618183c78a7315ba074abe7377c28b5/6128337338.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/be8c914f70ec9c080f5a3c8df28e180d/wexuzojukozasalogusobi.pdf
    • http://theclubburger.com/uploads/files/48498542715.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2d3165873---58420648324.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a14fe4bef6---tikadelijipezuwimuwaj.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed39bd9aa5---76484015590.pdf
    • http://ohmytour.kr/FileData/ckfinder/files/20210816_6650DC7125162FE1.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/6b9b4a69c1517680bd0f0f2f993e3865/davugewijejurij.pdf
    • http://harchovyk.com/userfiles/file/wavuzajudolike.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b286934dc7---zoguwasafuziro.pdf
    • http://aquatherm-graz.at/files/88567705246.pdf
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/javiloxarat.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/0f9dec2c6aec3b5cb7a9daf5003e3955/63581459230.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/umd9pbbi2aajtkhjnie2cesv5i/13991258486.pdf
    • http://unityproductions.com/upload/files/38339564786.pdf
    • http://mobilenmr.com/files/files/kimamisumufubam.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ratio+worksheets+for+6th+graders
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d12d.bin
0f0e1cc99ad79c0279397fda80e2cf737ffe56079716112dcf484ac8b6674fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD12D 10872 bytes
font_01_sfnt_off0000ea68.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 16792 bytes
font_02_sfnt_off0001027a.bin
4b87e8ca1631195abe7e1c83b4ae7bd087f56466e775d534348bba241e8cf128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1027A 18204 bytes

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