Malicious PDF — malware analysis report

Static analysis result for SHA-256 2002f2e48cd8bfd1…

MALICIOUS

PDF

80.0 KB Created: 2021-10-22 18:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 46a6d7f41c16bca08cb7f85e87b68abd SHA-1: ea6151c569db483aab37990a82a9da6ef7187dd9 SHA-256: 2002f2e48cd8bfd1a634ddc89c7c0f277d40322d151dbb096286acf3971d9d16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple external URIs strongly suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the embedded links and the ML classification point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://smidgel.ru/uplcv?utm_term=end+of+the+world+dates PDF link annotation
    • http://www.pes.edu.mn/ckfinder/userfiles/files/76881605342.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/regeguve.pdfIn PDF document text
    • https://ntdpoland.pl/eurostyl/photos/file/gazalefik.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/faluwu.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///rofugu.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/83722873605.pdfIn PDF document text
    • https://websitesiam.net/UserFiles/File/jilomaseroxo.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/aac7c259cb55285bf6095639b6b0fd6b/4393078067.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/vaxeperilirisolez.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/fotovanebogexutak.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/xagazebafepakivuza.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/36045635385.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161713de92e9a6---koturowazubudeme.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/lajoferoxiferopajemota.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/81998821261.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/19847842087.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/25187850206.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/95473159748.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153c66061bf0---96852955309.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/40628878059.pdfIn PDF document text
    • http://juncheng.tw/upload/files/luduzurofifomelavijoma.pdfIn PDF document text
    • http://rinsacars.com/files/others/zilizadezobew.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/7616437186.pdfIn PDF document text
    • https://www.posluh.hr/ckfinder/userfiles/files/8342422651.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD474 17888 bytes
SHA-256: 872114c7a129bd70cf604b647ba5eeaba62ebef7c916a38a33f21657869d516f
font_01_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10428 bytes
SHA-256: ce5b9d5c74b9caa7f9d7753bcebb9782a5729f43d4dde998ac7ecbaa98a722c2
font_02_sfnt_off00011abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1