Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7fed5086bde0597…

MALICIOUS

PDF

87.6 KB Created: 2021-09-06 01:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2db038741af7adefdccf74795316c643 SHA-1: 9f93b92085154eabcdad76b1fd98b814539b53d1 SHA-256: c7fed5086bde059744e8b727eb4cad5bed956ecbbb198e3800154e4e67984627
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://securitegenerale.tn/userfiles/file/dilufebibosamovidibegigu.pdf In PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/713dd3ee31dc1f3f5f6d4da3c08edf57/90286591581.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/pelerapusoloxa.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/netawedabebit.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc89548973---52194503534.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/31035075691.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/35758841749.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/romikoferor.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/sjaog3q188vqsu53440pgc5ce0/ligutafijabid.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/17044469763.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c17047903---42657719132.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124e3ac947d1---jitobawozukaj.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021073001521485.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/89361652127.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/9860809460.pdfIn PDF document text
    • https://coluer.ir/documents/file/71717492032.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160755e20a68d0---dubugekopetariwukirem.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983caf22197---72751966209.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210725_0366F2B53B3FF3A7.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/nthffr4k07v7g5fhpvp1igkpeg/12819698519.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d13b5ba852---pavitok.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/wunurososedavanizozonaje.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/26277959647.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/50262242643.pdfIn PDF document text
    • http://groupkaishan.com/d/files/12042730500.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=toastmasters+international+competent+communicator+manual+pdfPDF 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_off0000ed6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6F 10844 bytes
SHA-256: fd9f8418df0ba99a1821f9b9fa7a908d75f4323e8bc0f8658818cc8a00a125b8
font_01_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 19016 bytes
SHA-256: bc39b2130f0a3ed6ad723594e883efed546b78e2dfe437f6c53dd67aa9981f8b
font_02_sfnt_off000137a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1