Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bab374690f9299d…

MALICIOUS

PDF

71.3 KB Created: 2021-09-19 23:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 71d0e3b7779dc1f0a3414ee6c65cf64d SHA-1: 99b81fbddf59a280122874a746510593bc47deb5 SHA-256: 5bab374690f9299dfa54be221c148256b74ccac8939a2e285bb40dbcc517e794
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated maliciousness. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is designed to host multiple external links on potentially untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6585

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://philabc.ru/uplcv?utm_term=class+9+chemistry+book+pdf PDF link annotation
    • https://broadcasthub.com/ci/userfiles/files/pitekuxobasutusekin.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/gudosokiguw.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/32522489110.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/7525718902.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/putugufimosisoxu.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/madotuz.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/69009676907.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/fubarapijunupuritatanaz.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/45045242444.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/molufizitu.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/42559116995.pdfIn PDF document text
    • http://one9five.com/userfiles/files/jezuzudatilebepadi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d231a8d15---9953302529.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/rirerozinaxola.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/xumoriwogelafu.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/79519143342.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/tulixesenasazofug.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/juvolesarinojizabedexukab.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/53150861872.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/biwemuxu.pdfIn PDF document text
    • http://vswet.ru/f/75373034474.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210909115937.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/maziva.pdfIn 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_off0000c1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DB 17204 bytes
SHA-256: c98839a134da050d1b8893c3ed7a0995ab6be999f7159eb059cc851a7c1672be
font_01_sfnt_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 11324 bytes
SHA-256: 87d5bb5214e242b3b8e7663120906071414bdbb8e2f95dec94e4b66388af278d

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