Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb18e36307001a1e…

MALICIOUS

PDF

80.2 KB Created: 2021-09-16 05:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aaca19c2979e6ea02b9e5ced51115693 SHA-1: 2f091486b1d508423dc3be2f4bf5b487a4620970 SHA-256: eb18e36307001a1e57014de6ec5901e1dfdc2397b6e33cfa55c39ec685e25e84
204 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including ML classification and ClamAV detection as a phishing trojan. The presence of a 'Browser extension / update installation lure' heuristic, combined with numerous external URLs, suggests the document is designed to trick users into downloading a malicious payload. The document body is heavily obfuscated and unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=slither+io+lag+fix PDF link annotation
    • https://kingwrapcarspa.com/upload/files/sekoban.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a31527d3b9---litivapuboni.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/54655063636.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210916042903133.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///3608728335.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/tuzero.pdfIn PDF document text
    • http://haai.org/upload/file/74157411214.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c13079b55---9127397803.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16142179bc3b68---nufunagobivulolufitobapop.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/maditisanonuzozixixuropi.pdfIn PDF document text
    • https://geniodelweb.com/file/88607175398.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210906010730.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/97724638863.pdfIn PDF document text
    • https://adikmanis.com/contents/files/wufelo.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/51949811865.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/tepokubujilipodivad.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/79055664076.pdfIn PDF document text
    • https://digireg.si/upload/66522750798.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/88224653624.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/84750107402.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/lusebumiliwezolebasuzim.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357afe74fbc.pdfIn PDF document text
    • https://asken.as/bilder/file/34537155520.pdfIn PDF document text
    • http://sapthagireesyathra.com/userfiles/file/wenake.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/zokudigojutalijikozoxuwem.pdfIn PDF document text
    • http://benetalent.com/upload/files/33773302452.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_off0000d4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 18068 bytes
SHA-256: 0855b486c1391796c45044b11b6f4758a35baaa85dc533e1ea77937e89c816b7
font_02_sfnt_off00011be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE4 10400 bytes
SHA-256: 2982cabc4e1cbb58754289e16fc0074908a20e11b37f3162a58a81512c18464c

Open this report in the interactive analyzer, or submit your own file for analysis.