Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe902c4d5994ffe…

MALICIOUS

PDF

109.6 KB Created: 2021-09-06 00:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6ff9f7205a7357fb074d3343eccf2c9b SHA-1: 2afb8292842d67eeb7d1dd5b5d524e0a95b89ceb SHA-256: ffe902c4d5994ffe0fca5883ab2d802572c6a7f5288d943ce26f6dfbedaa6243
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating a strong intent to redirect users to external sites. The ML classifier and ClamAV detection strongly suggest malicious content, likely phishing or malware delivery. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://philabc.ru/uplcv?utm_term=lao+tzu+osho+pdf PDF link annotation
    • https://bor-diing.com/upload/files/wepozem.pdfIn PDF document text
    • http://tao-ssct.org/data/upload/file/rorusip.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/5b863e5e7391431eebbb2d00971a9494/soxobonojitoruzujolati.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/pakeregegovebufos.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/bevojoxevajabadipudijup.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/5774242996.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609a283f2821e---rijiwevezolefiti.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/94392311410.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/48486137745.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160943dddc7dd1---galaledabetovufa.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/74137588138.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607d91c67f97f---wezawamen.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/25940239564.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///gosozejetinugipuj.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210818_E3C04B47FB79C012.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/wumeweziwa.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d091e4cd58---jatemugexuvisemuwulur.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/42985645564.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d5eb38b9aa16ecb3941d7e643dc0a4f8/doleluwonawilonisifaxa.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/zugakofemulusoxegafipola.pdfIn PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/69383657868.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/92314340831.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083eadb1f847---79824706888.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/wedapakux.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/72359543973.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/a5c5bf454053007de471a4875fa42704/minusajazametewafasaw.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_off00014bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BFF 17684 bytes
SHA-256: bcc4b00762365819aee3b96210b985b78456f3fb1c597b5dce579e936dd56705
font_01_sfnt_off00017941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17941 10236 bytes
SHA-256: a08a09701a0df286deabdd9097aa5bff567e1deb0a9acf0981afb4da2ac23052
font_02_sfnt_off0001906e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1906E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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