Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfa85b73ad0149d…

MALICIOUS

PDF

109.3 KB Created: 2021-06-25 23:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df8c77a5f6c4cbe6db6280ffd25019d0 SHA-1: fcef7f92a2ae013278ae43636b54cb097636d6dc SHA-256: 9dfa85b73ad0149daf2f2289c5835a6aab968ab94c0d4e36a3d170f8df13cf32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, but the presence of external URIs and the overall heuristic profile strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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://philabc.ru/uplcv?utm_term=5000+poultry+farm+project+report
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/mqjntredab8ht78tkbhkbgtvth/kufuvuturuxavedufegi.pdf
    • https://lawyerupsmart.com/tempimg/file/11981011866.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/76873353f01de2142a5529daeb20a1a1/10169404556.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/48b6bf71e8d51b1025aadec4100a8762/43140986621.pdf
    • http://abc-tel.ru/data/File/10285170135.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f19a926ab---80332174587.pdf
    • http://budoprojekt.eu/obrazy/file/32485795747.pdf
    • http://thessalonikiflights.com/files/files/73463922734.pdf
    • https://readandenjoy.ae/userfiles/files/dexadomomurofipidebosi.pdf
    • http://nuitsdartistes.eu/images/file/82878058907.pdf
    • https://mszukam.pl/dat//file/jusabusofafuwupogopepib.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/37af9908981d34cb8a44e7f29ea412c0/vakakojapevimaz.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969e5c8eee5---vofomikarifimagix.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/c436ads6i3vjp83vvgc83dd2j3/magimakixevoxudop.pdf
    • http://sevimticaret.net/userfiles/file/13673809711.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607effdbc12e2---33407464319.pdf
    • http://adabaskimerkezi.com/upload/file/5452673720.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bae3c482a02---sopifuxirelovutirom.pdf
    • http://merrygoldholidays.com/ckfinder/userfiles/files/72560145037.pdf
    • https://hissekurban.com/resimler/files/gexamezanixojef.pdf
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/popikufedutonik.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/2bddb9485828a27cce39658ac99ef7cb/99500789197.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/jtv3o12gde290i0fqf800c38v3/davazazedevuwunaropaloxa.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadf5387e0---mudowiviwav.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/160719e24bc262---56678631473.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a581ee35d5fc7c1da6ed324bfa6f0729/92593363997.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000144de.bin
5657362d5db496506a07ab6928b452c013520fe9bd53b1b6997ca26fb29134b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x144DE 18900 bytes
font_01_sfnt_off00017687.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17687 16792 bytes
font_02_sfnt_off00018e9e.bin
d2b646ebec4090f92d8bf69d152ddb6fdeb97f416da9b7095a6cd56c027c53a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x18E9E 10780 bytes