Malicious PDF — malware analysis report

Static analysis result for SHA-256 6374a60df69c98f0…

MALICIOUS

PDF

81.4 KB Created: 2021-09-21 02:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d89e0faf3c1a90aa777b95a2d64b8b49 SHA-1: b1cb93b2f4d1db75592d7b3a789c273e1e347288 SHA-256: 6374a60df69c98f0d1a8e35a56115749edaf55a8c3bb8a5999281d72f20bc262
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many embedded URLs pointing to various domains, some of which are hosted on compromised CMS uploads. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing content, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://magicdiscoradio.hu/userfiles/file/vejibalidopevibarana.pdf In PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/genofudimolajika.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/kibusi.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/gr1b8bp0ft9kpaekqj2t9cksqr/28338960001.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/20212913928.pdfIn PDF document text
    • https://harom.ro/files/file/tujunug.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/1758200226.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/zotedasuf.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/kaxajib.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/87177964102.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/nujikegopigameguvodurisaf.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/36500701892.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/21308187274.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///40241612833.pdfIn PDF document text
    • https://arendic.cl/files/52666490303.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/nipuzopopajirefixozepu.pdfIn PDF document text
    • https://www.servicespace.org/inc/ckfinder/userfiles/files/xatitasasaninubo.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/g6nhg989bnkc2t5so57kkcsbdh/gukoz.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/15692590311.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f606934fd6---57583620176.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/ketezifulafelewo.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/70162236397.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/93812824009.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/90856818242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=ps+touch+apk+2020+free+downloadPDF 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_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 17844 bytes
SHA-256: dda6a8477f5b437e57099074e725010e58a74e6634208766c1df5779425e425d
font_01_sfnt_off00010644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5B 11144 bytes
SHA-256: b26f509e0c797db453e580b4516714bf3ce2b0a3969fab462a8d242148d07234

Open this report in the interactive analyzer, or submit your own file for analysis.