Malicious PDF — malware analysis report

Static analysis result for SHA-256 3565e3655dffaeb2…

MALICIOUS

PDF

84.8 KB Created: 2021-10-06 07:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f0c0649a22f642eefe1975415a7583f7 SHA-1: 34f2d09a039bb03efc9404fb8840871dc5e7762d SHA-256: 3565e3655dffaeb2bb9e8cc33a5a5359623451d6183ddf8f1142ec3035638d45
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external PDF files, suggesting it acts as a lure or dropper. The PDF structure and embedded content are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1b75f69bd47dec5089f9350739087be/wewoxul.pdf In PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/jalubeterixutilotulo.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/pirukonulowoxebi.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/lajibijefuvesalivug.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/87706867708.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/govelimo.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/74673597545.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf2349b409---renafale.pdfIn PDF document text
    • http://giahung.tincorner.com/uploads/files/63276229841.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/16182211864.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/93213829888.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/janonoroko.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/66842308081.pdfIn PDF document text
    • http://vhktn.at/images/content/files/daved.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/sevigoved.pdfIn PDF document text
    • https://purmoradiatoriai.lt/images/files/dajelebegatovoruxorarena.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/36141355058.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/1437087795.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/27577563026.pdfIn PDF document text
    • http://lecostationery.com/files/file/49511664607.pdfIn PDF document text
    • http://195exim.com/datas/files/87483253834.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/wafitejezomodipa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=normal+sed+rate+for+childPDF 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_off0000d6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 17008 bytes
SHA-256: 36412e6ee56098a2d0171492daf4aa366c40555b46f872c9f8df11a5df7e9a7e
font_02_sfnt_off00011b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 16628 bytes
SHA-256: 52873b624e4ad037799c6dce8d3507713a013d0bcd82e2f4efb1d6317c070c7b

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