Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e935766471689c…

MALICIOUS

PDF

71.9 KB Created: 2021-09-22 13:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0a42b0421d21d67c93cb60fb2dfa60bb SHA-1: d19477456a9c50b2629293f0cda441ee0cdf9957 SHA-256: 96e935766471689c504ca491539fd8deb81d3531f97142c6a53d48efd68f4bcd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded JavaScript, although not fully analyzed due to obfuscation, likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://smidgel.ru/uplcv?utm_term=pride+and+prejudice+full+novel+pdf PDF link annotation
    • http://1night2daytour.com/ckupload/files/52302201842.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/zevuw.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/gumonil.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/noranatafikofifemat.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/41036303856.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/rolidovuxutajaxomelunos.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/46842647532.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/zaputidoborodobamivuveb.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/rotapal.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8c711d1bd---23806516262.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/202109032001235666.pdfIn PDF document text
    • http://polishedskincare.com/minaret/uploads/file/sokabozozijuburegikut.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/b368567a37bf2dce17ecb72b248bb3e4/kogaxumez.pdfIn PDF document text
    • http://ajej.pretty-match.com/upload/files/jesokowutobedorewej.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/33784025096.pdfIn PDF document text
    • http://haihengpharm.com/upload/files/44747724462.pdfIn PDF document text
    • https://tutorbolivia.com/userfiles/file/66701057519.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/gurafudotu.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85500237617.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/varosatomojiwatef.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/28925697831.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_off0000b7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A4 16292 bytes
SHA-256: c1f1a2ad5ff4ef28d161692c1eb4cbb5098fd1359f74146b767297960ba4d5e9
font_01_sfnt_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A0 10644 bytes
SHA-256: ba15a5140a99eea7c115cebcae31e7bdce0d2856aa2fdd251179c619db7116d3

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