Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df3008dd73b3850…

MALICIOUS

PDF

78.2 KB Created: 2021-09-10 22:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 39bc1d333929907a48cd4d82439eebbf SHA-1: 6119899eb20bd5993b0806931c8b3d924fc46164 SHA-256: 9df3008dd73b38503fe8f8910b8a893f10406e67353bc4175387fca724fcbf1a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://ristoranteyuri2.com/userfiles/file/94933982588.pdf In PDF document text
    • https://concertwristband.com/resimler/files/gesufaluza.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/buteranumowavex.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210904013317_89xz5j.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/29743581742.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/67909848842.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/dajujap.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5ae172c28---61050052991.pdfIn PDF document text
    • https://priscar.com/documents/files/xokuseluwulopisu.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/tububuzerivazajusow.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109022316456378.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/xixumowobisuvokiv.pdfIn PDF document text
    • http://taigesw.com/upload/files/67236980937.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/pujuwedubokib.pdfIn PDF document text
    • http://irths.com/upload_files/files/46649591790.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210902113417.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/kafifu.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/gaxadegu.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/49477539759.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/dimigoleponabumakekoka.pdfIn PDF document text
    • http://jljemc.com/upload/files/88068759544.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/75493841389.pdfIn PDF document text
    • http://printific.com/images/contentimages/files/90504516179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=onlyfans+credit+card+generatorPDF link annotation
    • 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_off0000d55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55C 17032 bytes
SHA-256: 5eb6ccea8c8a829477aad147aae5934aa0c5d81ed47c6f9acdb9189f7346954e
font_01_sfnt_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D1 10788 bytes
SHA-256: 97ad1aa5c6575119e5a97eedb82523579b7315983d2c014f6caa7c4c3330de1b

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