Malicious PDF — malware analysis report

Static analysis result for SHA-256 7725eb06dbeb17b2…

MALICIOUS

PDF

88.7 KB Created: 2021-06-25 22:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e1fbc580eefd74ebdafdf98dba21593 SHA-1: c9b9aae7034dcecf9b7e36c7bda4331fb2bd1807 SHA-256: 7725eb06dbeb17b2dc69ac04402566496245a0473ab7576d84ce28a324240c77
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple links to potentially compromised CMS upload directories reinforces the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bbea805e9---56036251453.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/01242ecba72e8a72ed590257b402af1d/semavevasazimakoluxuwuzij.pdf
    • http://proxima-design.cz/files/file/zobojifajeden.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/284318ca9071682b9ee2abff428f9b14/52826166159.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1c38f658093aa0dac456a80a97314314/39674971271.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/c12d945c1e51fb2a6e2d9c47c4de2a6f/padowufanaxaliwiduwese.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/4ff46687622a75105a8a18e26ff0277b/dapafa.pdf
    • https://mimpishio2.net/contents//files/41543216101.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608796d29219b---lulejobaw.pdf
    • https://collegemahan.ir/basefile/collegemahanir/files/rikuluzalalopisix.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ff5b196d6---sevat.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bf0aa5753---rekivujox.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/15ed184977e52f7923781b5fc60f7f49/65823109953.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a94789aca---87520314401.pdf
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/ekr1g35179i4t4kkje9n20k3i7/91357199296.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/2kqgo7jh8070h9cplv2g7iov20/kuvidijojejibirujozerepaz.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/sh8spf0gd6d7cr8s2icg6bi45p/25309270030.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f5d3b0719cde17304f88018104f82d12/42945758646.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860c6753003---46702827150.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d1e11cc52db8971dc9e95924ebf64997/76230306867.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9353745f9---tinudatojuv.pdf
    • http://anhbanglaw.com/userfiles/file/10035143264.pdf
    • https://limmaginebistrot.com/file/fokijuvisa.pdf
    • http://netinflux.net/userfiles/file/xuwigefaz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=obesity+by+age
    • 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_off0000fabd.bin
d351fd8118cf0d768bcfe1f2a19bb02a390534254b329ac671c8f3a92f297870
pdf-font-stream PDF embedded font (sfnt) at offset 0xFABD 10192 bytes
font_01_sfnt_off000111d7.bin
9f56e3f7ef86350a18c34a6d52ba86dffb03c3a366a10aba349010ecda46a17e
pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 17036 bytes
font_02_sfnt_off00013dfe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFE 16792 bytes