Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9e6a704c8cf643…

MALICIOUS

PDF

74.9 KB Created: 2021-09-29 11:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 46fbb58867c847e40be399e540f32f14 SHA-1: 40e04ba5964f3be01a837b7f358655111ac2e4f1 SHA-256: 1f9e6a704c8cf643767b5a4c49dc6b80c14e7e4be3913d1d0c84a8a76cd43732
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are embedded within a link farm structure on disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=free+pro+ps2+emulator+2+games+for+android PDF link annotation
    • https://ssekolkata.com/ckfinder/userfiles/files/85261381262.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/nigazi.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109072115452117.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/85025423796.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/27400955983.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/59841570115.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/62587850436.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/40778108719.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/nulevezunaxawejup.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/4817027810.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/lalutujivejo.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/jurubovoramotimabeb.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/miwokixujusij.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/majixemodefufa.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/32933308223.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/74615271542.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109251633208279.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/gedelerokakudopufer.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/6044273270.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/fufemunupukemu.pdfIn PDF document text
    • http://noithatmfc.com/media/ftp/file/11333058511.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/xamudunulixujakasivifepe.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_off0000b5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EB 11036 bytes
SHA-256: 028420faad44a2559a495be2bf45230d79a490f7bcba59e32ffbe579588723a0
font_01_sfnt_off0000cf6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6A 21300 bytes
SHA-256: 93e270e4cb47b4906f98c1ebdb16249e44456ead11fa3605ba77631d553d7d4c
font_02_sfnt_off00010572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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