Malicious PDF — malware analysis report

Static analysis result for SHA-256 6084235555461caa…

MALICIOUS

PDF

84.7 KB Created: 2021-09-02 02:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 57e5fda8a60fb8bae339b92f092ad4d6 SHA-1: d90a78e82d18beda794c1fa2d59131a0db80649b SHA-256: 6084235555461caa3c5ce303ec252558bea116679a7456e54a15398b00a6971b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/997gjiofava1iis6bcti5r0pal/tazamisivuzefuxi.pdf In PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf979a53501---10834792993.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/mojagalejonalosifanewakol.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/41821666419.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/51fe3203b3db0b683af0c006056d598c/12631925856.pdfIn PDF document text
    • https://btegypt.com/file/zakajelifanupabevadamek.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/52567774991.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/putigukufazuru.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/c866m1us1uslkm97mk4p9n0vfp/11121792510.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c1c8f3bd11d903c5da3cf9f6d260335b/39980595498.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/16668486522.pdfIn PDF document text
    • http://snoman.mb.ca/ckfinder/userfiles/files/12648799587.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/39818607198.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b8c095e23---30964822981.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/dibigosiramag.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/41383292871.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f9373e998---nokosokevedumojewunige.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/30670327974.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/tru0m8egra1d0bfh0jd8nd9rdj/67772137457.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/d0t8gaoq4g3ec80lahd5ngaifg/zewubusutenut.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/7145252990.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160758214d9bbf---kefazujigevotogetake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=working+out+twice+a+day+bodybuildingPDF 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_off0000e60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60F 10900 bytes
SHA-256: 895abc6be21deccdddf3518d368c39b2f6841df39afeba3ea1f40a2fcd3cda72
font_01_sfnt_off0000ff46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 17748 bytes
SHA-256: 9068b4f6d665e4e12060699bc76cf9999332ad747bbae90695c99a892f7bd083
font_02_sfnt_off00012d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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