Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d324e19e1acdad…

MALICIOUS

PDF

53.9 KB Created: 2021-09-24 22:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d361a3481706cc1ff7b015de2667479e SHA-1: 3f0070f182df39abf92ff91806e5326fab46ea67 SHA-256: 67d324e19e1acdadef86cb3fe3236865665e346c316d855a4858f048e5571557
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which point to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting. No scripts were extracted, but the presence of numerous URLs points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5867

Heuristics 4

  • 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
  • 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://irlanc.ru/uplcv?utm_term=nulls+clash+apk+download PDF link annotation
    • http://evo-models.com/uploads/userfiles/files/kumudejo.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/womanez.pdfIn PDF document text
    • http://schokobrunnen.com/idata/79648284812.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/derujuneminupatikusex.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/23380480766.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/66690d4574ce6e0a724ab7248c101c36/5837436170.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/vidomabetobozunil.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/runomume.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/54603020908.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210905162508.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/xopovi.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/29539235500.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/97605193131.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/65966713556.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/ff3884714215ac160f0efba4e7e0a7d5/79161291326.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/14103632245.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210912_AFBCDF115D7014BF.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/ratejegapojapulegoluvadol.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/kodobexujakoketemu.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/76737937742.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/muzenilovo.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/67996412124.pdfIn PDF document text
    • http://armanetti.com/images/tasepomejeritesanadare.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/51611527651.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/nuludipufivedipat.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/65269752751.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/64765408642.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C2 16460 bytes
SHA-256: 52cf4596dd33b71e5456af29fe91fc6b491470700c1bb01419be20651f493384