Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd12fa1daa23e93…

MALICIOUS

PDF

76.1 KB Created: 2021-09-06 14:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 202b71281c0627a5378178653a84e88b SHA-1: c19576582c05761568b1362956d6c18a8fc67541 SHA-256: 0dd12fa1daa23e9391ba1680aabb6cd56228a217ab0aed1dcb163afb1e190275
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics suggest this PDF is part of a phishing or malware distribution campaign, likely using JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://bancodevida.com/bancodevida/admin/images/image/file/67987993531.pdf In PDF document text
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/ludexonubej.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a011ff1aaa---20959499023.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9cc03530370268a68a73bbe36f2b4af5/mofaxenawunotuxazibi.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/57272403316.pdfIn PDF document text
    • http://dptour.net/bot/ckfinder/uf/files/sepesogebivetudawojawo.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/57467360018.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/medubezigiwanid.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/76522505337.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/muxapawifadiwurumixozeza.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/dusujirewivesasarebepo.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/90273113421.pdfIn PDF document text
    • http://fitviewer.biz/files/file/malavexemivevozupod.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/pemuliximimonalotu.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/lojorid.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/topotonakaxi.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/47c182ae7f16c036bc1353985ac617d3/wurisuxul.pdfIn PDF document text
    • http://bifruit.mk/ckfinder/userfiles/files/buvemajizumarusuwegugosur.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085cf3b7b633---zozekonifiwaxow.pdfIn PDF document text
    • http://fitviewer.biz/files/file/kanunorelu.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/99584573397.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021072720193773499.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/0b3cb2b30e42221c98a643812e01ca9c/bupavezigo.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/fevesotabimo.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/moxatadakimuni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=traditional+education+in+zambia+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_off0000c4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E6 17244 bytes
SHA-256: a36c6b4e2b56a22b523fa00231c7bab401e5c0ddfd7b9328238895f5e3435dca
font_01_sfnt_off0000f16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10985 10876 bytes
SHA-256: bfd47a0619370e22a871d68a2277ef75d0c2d17fa50a3c137a39eb7db1e6241e