Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6ed7a71cfeb075…

MALICIOUS

PDF

86.0 KB Created: 2021-09-20 19:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a95ff8cd7f37ec5947a737f7c57556c3 SHA-1: d62d6194708c1f3a5b19ed461d0530782b239429 SHA-256: fb6ed7a71cfeb075a500ee287083823ded5b1a0770948915b780a42e5652c672
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a fake browser extension or update, a common social engineering tactic. ClamAV detection as 'Pdf.Phishing.Trojan' further confirms its malicious nature. While no scripts were directly extracted, the presence of embedded URLs and the overall structure strongly suggest the document is designed to trick users into downloading and executing malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ketchas.ru/uplcv?utm_term=aimbot+cheat+ros PDF link annotation
    • https://budgetparking.ca/admin/uploads/file/48926130318.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/73850915454.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161445dc9a8419---sadepugexa.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/82273323362.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/9645342857.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/metixifupowu.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/divikomadevupifi.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/sghkcgnp8umisdchuqevmc00k7/89302644132.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/3892354056.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/gigixasezemedefesepexilo.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/11625143451.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/vr2p8kiruibmp6lhfevvgsss7p/zepofojodalef.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147e11ae02b8---vabugenowagejigikuvib.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161471ac753f47---tifatimesilesagomupobumot.pdfIn PDF document text
    • http://jiji.pgo.tw/pic/uploads/files/nifukiwik.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d4ce8c585---wajeralad.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/66743480543.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/83725833063.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/27307028808.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/kamasoneselirufupega.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/linaziruvaxamavegemolelo.pdfIn PDF document text
    • https://protum.se/file/dodakunijotuxuzorelalid.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFE 16132 bytes
SHA-256: 071bac7a3a90310621307d68123817e30fba7c89f9e5021c4391eb43bd8b9137
font_01_sfnt_off0000e471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE471 20644 bytes
SHA-256: b732bf3328091f7b949036f627fa9641694c151a28e6647fd6d7eb87dd24e6ea
font_02_sfnt_off00011a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13234 10468 bytes
SHA-256: 0e22b4ccd4aa49252e036693c8f2feba9bebee8d3b1fe94729f33f1aa07fcc07

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