Malicious PDF — malware analysis report

Static analysis result for SHA-256 2710671d08161408…

MALICIOUS

PDF

90.8 KB Created: 2021-08-20 17:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: adaf6d4796000fed102d70c790213bd3 SHA-1: 0273c375c763429046736f4e093774ace2e1003a SHA-256: 2710671d081614080cca64dbaf3070b199823636650796893d8a1ebf91521dd2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://advik.net/userfiles/file/92387650934.pdf In PDF document text
    • http://md-servicios.com/userfiles/file/gomikumimesoremamej.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/radinufototodurufavitepi.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/15a516c8c5fd2b050a4e6016b6026a04/viviguzojow.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fukofitut.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160763db0df71c---19601732359.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/71616993847.pdfIn PDF document text
    • https://stbenedikt.ch/userfiles/files/loxajupum.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53c57d166c---tenikapifonetixusates.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/34040318081.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/92272612914.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160998130a779b---28234667484.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/83333950937.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/9f4e695c2af361b7952e0f80079b5b29/98364870851.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/33022079373.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/81932933328.pdfIn PDF document text
    • http://limoride.net/gallery/file/18798093431.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/v61m4ifee8sn2otb63rcas27uq/55672903074.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/sazuselaraxixuv.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/bebabaw.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/41767727069.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d96bf96b5d2c4f88dea35ea358ee890c/pafafumawakozumatalivivis.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/96577821616.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=lords+hooray+legends+of+legends+gift+codePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 10828 bytes
SHA-256: 32d20db1fa4b313d5f304610e2aac462e464a3dea2f9c2db24c9ccdacb3c2b5f
font_01_sfnt_off0000f72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72B 4412 bytes
SHA-256: 818e2bf802bf71fab76cd4791324783b620f9da6ff4989805a26eb45d99d0c02
font_02_sfnt_off0001074d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5F 30668 bytes
SHA-256: 3bad5245adaf9946dc17096db2d1c5d9c97d9b50e824ec7fb05c1b3a30af5b1a

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