Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d3a46784a2ef33…

MALICIOUS

PDF

69.7 KB Created: 2021-09-08 20:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 28006b395c2db09d5cd66c2759120157 SHA-1: a23bada20a96012baef1d497f386d2bd2fccdefa SHA-256: 10d3a46784a2ef334d8b7a1c31bb4c708fe2dc30cc3fe8a8aa1f02ce22e96c11
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://cachnhietwin.com/luutru/files/kekurelu.pdf In PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/lirenirirowofanuwemom.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/mepamijilasubuwexozo.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/rumupaveguxivifomaxe.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/75208825335.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/6760320579.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/13040264510.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/2186843578.pdfIn PDF document text
    • https://renewone.de/files/kokipanuvupirij.pdfIn PDF document text
    • http://travel-door.com/userfiles/file/gijujejobigud.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/75216419917.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/jetivuvofa.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/dixukevodotewe.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/koledakerozak.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/riregetikojojosexamoti.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/70205954956.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/winodazubemuwoduzebi.pdfIn PDF document text
    • http://4rrecycle.com/files/file/89070686076.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/zeferibasimejufapi.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/55068605021.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/velenaxalijejivele.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/ropefodafetipi.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/98806839313.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=nursery+worksheets+abcPDF 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_off0000afcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCF 15964 bytes
SHA-256: 59800b0d4523f7410a198bac6c8d42262e26686aeff1375c274beee929ab22c6
font_01_sfnt_off0000d8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 10596 bytes
SHA-256: 86786fba5a2991dbc6162497143ffbcc8f77d547834bb5503c8f9a401a9b5909

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