Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f6bc27091c7d74…

MALICIOUS

PDF

90.7 KB Created: 2021-08-09 03:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cce436228be9be3cec029e0b4ab99bb0 SHA-1: d40ec2cccdf0ca7719795f55af2756b5391928a6 SHA-256: 69f6bc27091c7d74696d6a89d7e28c816fcb59eb0e0bd3ed144b849a373a2d31
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the PDF functions as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083586aa56a2---jalifajutobetesu.pdf In PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/64427410305c8a40ea7927e79930c2d0/nunuxevi.pdfIn PDF document text
    • https://wrd13.com/force/file/31305610553.pdfIn PDF document text
    • https://plasy.com/uploads/file/vidobavaferegelujurupepol.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160747b41850f6---80633237969.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/14963109610.pdfIn PDF document text
    • http://camonetinternational.com/files/file/bepalesovenezugugowagokip.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/lalufukiruw.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/3bf776748f1a89f01c5a598ce875bc58/32195195609.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/bb72e61df7b359fe61569df3ed8ec1c4/73815328973.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/13986354065.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/90ab62aba7e27f2d544a5b84e3da7ce3/samawewazejugugode.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/badomabidusabubu.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074579235eaf---20792143808.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/10158443657.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0b485cc29---bigijiviv.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/ludipufowixi.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/kidegonujebuzet.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/85034874746.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/37581259790.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d5f323926beaacdadf6dd1185c80cd46/26940399005.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=exothermic+and+endothermic+reactions+labPDF 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_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 10860 bytes
SHA-256: 13798467a0e52a4cd264fff27c6e5127b88dc443b5112e8c15e16d0cf603f7e3
font_01_sfnt_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 19924 bytes
SHA-256: 4c8c67513a1d0b37fb5601c996cb908f2a6df90eb0162c6b395ba273f6998afb
font_02_sfnt_off0001452a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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