Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b50b48409ecbc88…

MALICIOUS

PDF

82.3 KB Created: 2021-09-13 15:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e2ce1a0c14aabbb775cff2f24d2fcf3e SHA-1: fb365bdaf7e790bc8eeff033d54b0ee4a75fe82c SHA-256: 6b50b48409ecbc885f62fec00eef3e920724c40354f1a818af8e535d0426799e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=call+me+by+your+name+pdf+file PDF link annotation
    • http://everbeenmagnet.com/js/upfiles/files/21740477284.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/19131471928.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/60234175395.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/xetotafomituneduzifimaxeg.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/41201211035.pdfIn PDF document text
    • https://kvzriu.org/images/file/84652740816.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/70588074352.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/wawigejararopekasuje.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/jagagofakarigabovosewagef.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210909005048.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/94734269346.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/wefilirabelogadu.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/63889449705.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/72027563509.pdfIn PDF document text
    • http://billsky.ee/files/file/kejurugefa.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/77047655705.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/wofoj.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/rowoxulivudozatireti.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/zevipusis.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/76458220504.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/lunirel.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/lebebilokufiwa.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_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 10776 bytes
SHA-256: 098b062e5ae760c6b0d62a1221fd04f3b77ec99589e311f811dd2263fd647f05
font_01_sfnt_off0000f49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 18012 bytes
SHA-256: 3d117cba585d2ef90fa02768d495ecc9610c422a0129745e0d8587ca1e1e4cf3
font_02_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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