Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f89aeae209ea38…

MALICIOUS

PDF

78.8 KB Created: 2021-09-13 22:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21e3571b06d4a4b47fc9d041f8dbc2e8 SHA-1: 723213e2ea50cf66f32d67c1f069d5b41a7ec0fe SHA-256: 23f89aeae209ea38534fc29389503e52b74704c61498433b24c74395414c71b3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://manhalhealing.com/userfiles/file/85421912443.pdf
    • http://vntattoosupply.net/uploads/image/files/38569169412.pdf
    • http://faw-asia.com/image/upload/files/mewefasiv.pdf
    • http://www.contectrade.hu/fckfiles/file/gegurunigavuko.pdf
    • http://baovethanglongmb.com/upload/files/nenagojutujodofazadi.pdf
    • http://winso.tw/userfiles/file/89561630117.pdf
    • http://asesoriazabalburu.org/azaba/files/file/rozavepejujizusuronifa.pdf
    • https://stka.gr/ckfinder/userfiles/files/38181517127.pdf
    • https://bostaninsaat.com/image/files/30677046029.pdf
    • https://transturist.ba/ckeditor/ckfinder/files/files/87596649000.pdf
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/lebekasagurajuxuxaf.pdf
    • http://mariautonoleggiomarsala.it/userfiles/files/bokusufuk.pdf
    • http://simsvizag.com/contentimages/file/18805674994.pdf
    • http://irinka.org/ckfinder/userfiles/files/jilema.pdf
    • http://albertopizzetti.it/userfiles/files/mekivewikevusevedokegira.pdf
    • https://semsaesp.com/ckfinder/userfiles/files/80849174550.pdf
    • http://baharev76.ru/userfiles/file/48432413503.pdf
    • http://sushikyototogo.com/uploads/files/soxanupexuvofujuretejalej.pdf
    • http://aweibel.com/Photo/file/94581290927.pdf
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/67573630917.pdf
    • http://tolgyesvolgy.hu/userfiles/file/gakelop.pdf
    • http://timebank.ru/sites/default/files/photos/pagefile/wireviserogufelirudugu.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/fikurifufikixalubafa.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d4e61a3c9---dunaseterodivilamena.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=gloud+gta+5+emulator
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce75.bin
19b6424857d62b0826bdbf40aa03bb1e4e65486b9279561597bebc948eede577		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE75 18096 bytes
font_01_sfnt_off0000fdab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAB 16792 bytes
font_02_sfnt_off000115c2.bin
6e1deb354d3fc78221d4750ac0b8b9854a71c076c22cee7fa7912f2368389447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115C2 10500 bytes

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