Malicious PDF — malware analysis report

Static analysis result for SHA-256 367fa2d6f02dbb39…

MALICIOUS

PDF

81.6 KB Created: 2021-09-17 19:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 199210f756ec740e755df90accfe537e SHA-1: fe96e66c1d4e336863e18bb94e2a4fd10d8023cf SHA-256: 367fa2d6f02dbb396f6a084b13ac3655cbc0ddaf1b1b8e8a277cbba3b3e62cbb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, characteristic of a link farm designed to distribute malware or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://telenovella-bg.com/files/76342086746.pdf In PDF document text
    • http://lightofislamonair.org/uploads/files/84549939528.pdfIn PDF document text
    • https://gosselindesign.com/images/from_fckeditor/fichiers/9535730210.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/4086076887.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/befefavadelake.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/numagubetutolametalivel.pdfIn PDF document text
    • https://luminex.pl/upload/file/zozinifesinogegi.pdfIn PDF document text
    • http://friulanapanini.com/images/file/fefogefalulejawom.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/12005005559.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/23698927352.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/83139101166.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/31097613552.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613498b09f60b---fepakopu.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/50233063646.pdfIn PDF document text
    • http://mfahk.com/upload/files/ketoxixodadikanadekan.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/fojewepapaborerudadipulun.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/15736396697.pdfIn PDF document text
    • http://greenbrier101.com/userimages/33076315731.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddce867015---kevorolepef.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e75ec67f7---29885959268.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/sikisugov.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/bigafezopopasimozelamital.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161449bd36b8e4---52044435593.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f33157a180---jopafoj.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/71567714413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=warcraft+game+on+androidPDF 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_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 16804 bytes
SHA-256: 5a8076f1c843010255fe2b6a1978c1a0545e40714308b872877319e1dc58f895
font_01_sfnt_off0001083b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083B 10596 bytes
SHA-256: c62bee65b34588374a4d4f0c7c56c55249b9f5db39581a22caa71a59f1b164cf
font_02_sfnt_off00012042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12042 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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