Malicious PDF — malware analysis report

Static analysis result for SHA-256 4448c27710de14be…

MALICIOUS

PDF

109.1 KB Created: 2021-07-01 19:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: c907ab91b818c52c8cc857f55dfb93f3 SHA-1: 8f87e96afe1df98d93515e988bdd2a4c34a4d0c3 SHA-256: 4448c27710de14be2585e9ab950f6af4687da14cc2dafcd3c39589a6b2358288
154 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 0.5380

Heuristics 5

  • 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
  • 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://crysiq.ru/uplcv?utm_term=define+gdp+and+gnp PDF link annotation
    • http://apricomm.com/userData/board/file/26537248053.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/xinutuzedolunoliliri.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094cfa5190ed---peboxurij.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/89759829225.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912e5bba815---27500586542.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/55udkq583d2g8b29e4l8ttdrnl/30824271587.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b35f5570d---29873406385.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/df10f825fe7b5c5d1b82c3b48560fe08/29188418089.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/p1ur42j4obt8a58vnspkgt3q0n/milogivizeti.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/64182342034.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/buvidevamesetip.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/59hn1tl48ro2fhkiks5ppi1olc/sarulogawewalumepu.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/nsd5k04lrfcid5e1duv06pbt9h/78699065533.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160748eca053d5---93859395777.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d5a364024---70387690944.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb71c9c8998---19273599803.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/eacc74d6d07966046c07e0d8ea8739e9/gokexaxamaj.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/sp1mo9l6i5cogi0hupgmd28dpr/45709591164.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c717f99a7d5---66713841932.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af85f9012f5---rulexoxedezatimozixogax.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/37760303983.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17735 10140 bytes
SHA-256: 94554937666e892afcfadb251da4e4b77c113255043e27e63c64e7e7912c9963

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