Malicious PDF — malware analysis report

Static analysis result for SHA-256 70954e700bda8ac9…

MALICIOUS

PDF

87.6 KB Created: 2021-07-28 15:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: daa00027dd51c426c95a3f1734e11141 SHA-1: 96c8f5240d2a8ce2f57fc7345d71b19a78a534e6 SHA-256: 70954e700bda8ac9cb21c7869f0091e9307e52bc122aa526df09cc0f47eba638
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common technique for distributing further payloads or leading users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a0ca2ef192d92a35083cb18ddbf88cbd/80134424234.pdf In PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfe6d1e5c6---97904651531.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/70888024439.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/29850610038.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d3db9d8e5d5e8856883eacd11e656b91/xebisevokolojotujudutona.pdfIn PDF document text
    • https://masihpt1.com/contents//files/37602165626.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/a1j5963ca52fh82kj05ao3vol2/farijosigex.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/lipogidumi.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/devanaforotoxen.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/jetal.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160fee937bb38b---zusapi.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45505e6911---53373034054.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/f4b8960e8b284c1ea7a17368b254d957/47102820944.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7760c78383---46800827986.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/9kpgtopmb1689ouv3terd12fh3/23929657879.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92fc667cd---wasegodugaxopijiziw.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/58066415818.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/moxet.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/eusc70f1ccc7ivd5kjj67smhr7/94200712842.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f9818352e---bupetudegiso.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/niwefokifunudov.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/xutiteriwususevubote.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9977323f38f7ae7544b29bea34d87b48/sijunod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=navy+medical+chain+of+commandPDF 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_off0000f46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46C 10532 bytes
SHA-256: 8e6ad1f35a6ddd5e729619c6066dba48a24a8638b840aaaf22b2b525f7f002ab
font_01_sfnt_off00010c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001243a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243A 16616 bytes
SHA-256: 4e4a5cafff55c69c1844ce2fd5652cdd21f152af8e1909d0da1383ef3ea88b8b

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