Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbdd836b924c6a0…

MALICIOUS

PDF

77.3 KB Created: 2021-09-09 16:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: 2285858b316937b1400de2aa1f675cc6 SHA-1: 467d596d18e6b0e03e898820a2c33be0bdafb6f5 SHA-256: fdbdd836b924c6a095223ae2869a76811bb412c178384b15d64b6aac0bec5bef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://emons-verlag.net/testarea/cwsCMSlight/media/files/67975987837.pdf In PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/viredomogebid.pdfIn PDF document text
    • http://china-guolin.com/filespath/files/20210909184217.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gijejadigime.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/30124493253.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/3991485089.pdfIn PDF document text
    • http://sissonne.hu/editor_up/rulexuzod.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/xisibosijebokeko.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/50233626851.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/40835626628.pdfIn PDF document text
    • http://schokofontaenen.de/idata/72544989481.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/burelirat.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/pukivigozulilugomaxata.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/33757695711.pdfIn PDF document text
    • http://kangmeideyiliao.com/uploadfile/file///2021090801225962.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131557e706ac---46534280557.pdfIn PDF document text
    • http://ingore.cn/upload/files/28447508789.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/86510489179.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210908183812_5zjvfk.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/85798318279.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/34228994087.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/xorasivovuvupelod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=melhor+contador+de+passos+para+androidPDF 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_off0000c7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DC 19124 bytes
SHA-256: 46717becb52a665a19b4fc25c00106c737ce12ccb5356686357fb9c072eee847
font_01_sfnt_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5B 10604 bytes
SHA-256: f7038bb81b84c49cf1eede69983180a547322cd4339332a61815521e4f9fff2b

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