Malicious PDF — malware analysis report

Static analysis result for SHA-256 294bed5a00c1f2db…

MALICIOUS

PDF

84.3 KB Created: 2021-09-18 18:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4f20f0181d799166135da24b5201b480 SHA-1: af0192561c6e31bf7ea3f731e8737096afc6cb42 SHA-256: 294bed5a00c1f2db3f4fcf578685b08c4cb68ae0b161d299896bc0abe6eafcf1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=fly+me+to+the+moon+bass+pdf PDF link annotation
    • https://mimpishio2.net/contents/files/noxajuxikovexaxasi.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/jirusuruxidowenarokaja.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef00b6801d---diziwezoz.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/mofadazofit.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/devan.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/gefozadutekoxujeloxibiko.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/46053857395.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141fca2bf469---nagametamutidipevur.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/3129218596.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e40d80148---fatolotawoduvanizito.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/pepewujirubu.pdfIn PDF document text
    • http://homeopathyhk.com/files/zimod.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/darigugopuxefadorusawo.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/39436874170.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210904160811_991604190.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370011854d0---zibesijerunowutade.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/2375748362.pdfIn PDF document text
    • http://orem.mn/uploads/files/60025817715.pdfIn PDF document text
    • http://robbes.nl/media/files/2028788502.pdfIn PDF document text
    • https://hobbypet.cz/files/file/mobemojewazapikilorazef.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/28679890244.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/durisenalupizudazilowef.pdfIn PDF document text
    • https://mahae.hu/files/files/sirawokomidej.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/42390764142.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/89356058533.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_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 17992 bytes
SHA-256: d0b7756dbe0d8216401a9bed89b9126963b4f3b03ef468e84cefe87ea26bc4f2
font_02_sfnt_off00012b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B12 10800 bytes
SHA-256: 94f1861b62186d0e7b216fe16e242b52efc56353bc65fad6bbb96a9c99075661