Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e5b58a87d242b5…

MALICIOUS

PDF

72.2 KB Created: 2021-09-26 10:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: bf91f68a4dd5205bd51cefde4ac439f2 SHA-1: 8319bc0e0a32a8735492eab52becbadc98d7e9d0 SHA-256: f2e5b58a87d242b563328a1a798d1fab9cae2851194c99616764d6f6d19cc2ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to various compromised websites and potentially malicious PDF files, likely to facilitate phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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 http://daechienglishpark.com/ckfinder/userfiles/files/57250673937.pdf In PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/97db164daee8284cd3edfd342ff61ba5/fuvalebided.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/26870886812.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135fd6bc5dc4---bufanebaxusolajomolu.pdfIn PDF document text
    • https://yellowstonewildlife.com/pokirotuga.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/savafaredas.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cd3e2f16e9---53836840706.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/79179153963.pdfIn PDF document text
    • https://aildf.in/userfiles/file/92987599465.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/jatile.pdfIn PDF document text
    • http://skia22.ru/pic/file/75587539008.pdfIn PDF document text
    • https://kaparatt.com/images/File/31080696722.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/xozuwililalutikaga.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/pawirezuwekereburemujado.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/pojerobemizatepegokopu.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/diguwifawoluzonalarudoked.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/ralagiline.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/5849483161.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/62407932087.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/93903336442.pdfIn PDF document text
    • https://salwangurugram.com/files/sufekeguredaluze.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210904_419E14C693532F0C.pdfIn PDF document text
    • https://tierlistei.ch/downloads/74943344742.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/pofokafu.pdfIn PDF document text
    • http://www.bash.cl/media/file/26675135583.pdfIn PDF document text
    • http://millenium.moscowfashion.net/content/xuploadimages/file/degatimibugigemuluxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=wwe+2k19+game+download+for+android+ppsspp+highly+compressedPDF 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_off0000b519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB519 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2B 16160 bytes
SHA-256: e26147a14c03bbb5703b0ae9f64daa168f44e4b25593c6d4159f559fd88f7d59
font_02_sfnt_off0000f707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 11596 bytes
SHA-256: 5263a9966e4733627308ccbe9f2d1c938e80441289dd1d46f8f80a676d757294

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