Malicious PDF — malware analysis report

Static analysis result for SHA-256 626b5daf30ede3bc…

MALICIOUS

PDF

76.5 KB Created: 2021-09-18 18:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 287f41aac8ebc8a1fab2473b935b614a SHA-1: d68e003de488ab291bc0f2e5d68ac64a6867bbd0 SHA-256: 626b5daf30ede3bc56ca42c0e666471aec98d251b1c01b27374e5de230f360ad
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm on disposable hosting, directing users to various PDF files hosted on potentially compromised or malicious domains. The ML classifier also flagged the PDF as malicious, supporting the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5631

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://garglob.ru/uplcv?utm_term=rdp+android+emulator PDF link annotation
    • http://p-itos.net/admin/userfile/image/file/mosutebe.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/70960124176.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/8686350072.pdfIn PDF document text
    • https://fasaac.org/temp/files/dugusul.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/42119984729.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/83314168821.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/11954184213.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210902082125_790222334.pdfIn PDF document text
    • https://funke.be/data/file/16836633295.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/titogigazi.pdfPDF link annotation
    • http://srilakshmienterprises.net/uploads/puvimidimumofukovojexi.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/43795067488.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/xodez.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/xegodufonopikovugatid.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/bazemazekuwiwe.pdfIn PDF document text
    • http://alothongtin.com/upload/FCK/file/13666212091.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9390259b6---xiwejinekedawewarigomomed.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/vuruxawuvebirir.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/potebifemebadudixaze.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/wazoj.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/kikigidum.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/sisejoviwekezekiraxilup.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/bamerake.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/16208971031.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/feradudejo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B9 17872 bytes
SHA-256: 87bd4b4943cc99b8def3ddf5c22b3e395e71aa8565417fa096de00f3ff596db0

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