Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead6693fdfbb63d5…

MALICIOUS

PDF

73.6 KB Created: 2021-10-08 06:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 472fc609d45441f69e45824d45722c93 SHA-1: 9bb7d1527748e790dab27a139e68b90fd33d8fd6 SHA-256: ead6693fdfbb63d538a2d8c9c3f5b3e03273288783d2acac322775ca5c4d27f4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded URLs pointing to various domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://garglob.ru/uplcv?utm_term=title+page+apa+style+7th+edition PDF link annotation
    • http://saveursetsavoirs.fr/image/file/85168345059.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210914_0E71CFF971FF878F.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/peludob.pdfIn PDF document text
    • http://baove247.org/upload/files/bobamexodiwosiwawe.pdfIn PDF document text
    • https://ises.smithpressautomation.com/phpsites/vertical_living/uploads/file/tiliwewulujo.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139dfe29fcad---wilatibizo.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/fewasipo.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/zojefasadavejipuke.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/38309239373.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/58866422915.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/72631074613.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/buduvamuwixedazor.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/88777094138.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/debek.pdfIn PDF document text
    • http://cascad-trans.ru/files/47184160834.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614173cc25cfb---zupuxitalozutudow.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/fedawatilelozabopuj.pdfIn PDF document text
    • http://soc-in.com/data/media/files/60425486055.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/42542074640.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/mekigatebelazolud.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/vozepasinedag.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/91709127893.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/dafevomi.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/jukotamusumonetol.pdfIn PDF document text
    • 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_off0000bd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD24 17072 bytes
SHA-256: 44d0cb76cf8118d685c72ee8aa60984fb600a2a449cd44b2b59495a1aa3b6234
font_01_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 10696 bytes
SHA-256: bb43487edcb41c5bf3669251b591131662c9cacbb2f8709c2a5315054c89498e
font_02_sfnt_off000100d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1