Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6f547e74ff0d0a…

MALICIOUS

PDF

88.1 KB Created: 2021-07-08 02:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 51d31c6efd8b499a688037cf124ff475 SHA-1: aaf85bd5a6b717b567acd4095341205b39b7325f SHA-256: 1f6f547e74ff0d0a1ed07a6e276236578c572e36e4214885ff9eabc95c4df3f0
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress upload directories, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or trojan payload. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://womenwhorockarkansas.com/clients/4/4c/4cfcdabbb7b8ad81bafe9a4295858145/File/50942424522.pdf In PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/16855752862.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/02c619b947fb62969043142e3b46a4b9/41752092157.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/91930004233.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/db0aa9ccb8698af60a6231ba4bc225e8/95051518440.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/a8b09f0e2f0c2b4adeee89ff2e130519/25560007917.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/30776859579.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/nfeksnm47mrcuhn1fa7b35uu6o/xipovekatozigoxaw.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/46637075751.pdfIn PDF document text
    • http://cortabellanews.com/userimages/jutadijepujeluzofoveg.pdfIn PDF document text
    • http://royalgroup.at/tmp/bozapadujumowesedusufot.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/34737228264.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/vumodotudi.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609241f9ef1eb---30938403441.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/rasozipijedelabimako.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/39152014383.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/p0o4r0sgr0oho329rcdfrad96a/15196936490.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160da9146cce2c---5795559282.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/1b0a2d5bb951cc257b32d5eede40e286/82032180249.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/26105636037.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210624_B0F003CEB9FC0A7C.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab01b9a2ead---52624504359.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/ecb0b371ad8838a1bfdbbd416a3f304c/76229012642.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/84168238369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=song+brush+up+your+shakespearePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 16476 bytes
SHA-256: 620cc0073e18e59dea4e6dbf52cbbd2e57a03e96700e167420d6b7553c07a63c
font_01_sfnt_off000120af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AF 10816 bytes
SHA-256: 161f10a28e7c8ea728c0c8c858c0a14f16611dcae4ab9aa61e6deb3ae5543c2b
font_02_sfnt_off00013964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13964 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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