Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1b040a6647e98c…

MALICIOUS

PDF

77.1 KB Created: 2021-09-16 00:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef6fc4a254f5f35729664566089fa4a3 SHA-1: ec629b1abd1a47e029a7e920d119717b836941a0 SHA-256: 9e1b040a6647e98ced2ce70dbd0f6892c66f5cdd6d8310940ab7d29425d76bd9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to suspicious domains, and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of this document being used for phishing or to redirect users to malicious content. No scripts were extracted, but the overall structure and heuristic firings suggest a malicious intent to exploit users via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7333

Heuristics 4

  • 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
  • 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 http://lidaoxc.com/upload/files/jubugevupedinajupij.pdf
    • http://shiny-baby.com/fileimage/file/pegogazu.pdf
    • http://kmbb.at/userfiles/file/63370565526.pdf
    • http://aptekarynek.pl/zdjecia/fck/file/firazojiritetapel.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/161425f014f24f---3538967509.pdf
    • http://wadsoda.com/UserFiles/File/4869768448.pdf
    • http://akcjonariusz.com/UserFiles/file/31200916027.pdf
    • http://jujucuisine.com/userfiles/file/xinosetirusexusevog.pdf
    • http://domadoma.cz/userfiles/file/52636321.pdf
    • http://headlinesdinerla.com/uploads/files/86047716239.pdf
    • https://komunalno.vrgorac.hr/files/64803632924.pdf
    • http://sushigonewildtogo.com/uploads/files/podal.pdf
    • http://oshcongregation.com/userfiles/file/10560678656.pdf
    • http://bpabv.nl/uploadfiles/file/kasogunisinekozarogago.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/934452c3a31d5c6996d4310932444bd2/badizugisusi.pdf
    • http://scuolascifondocortinadolomiti.it/userfiles/files/sakinajekomujux.pdf
    • http://ymmicro.com/files/files/90054171997.pdf
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/zawuraganodowume.pdf
    • http://shengnabei.com/uploadfile/file///2021090418080027.pdf
    • https://fullgame.hu/uploads/files/jotobidakixi.pdf
    • http://tekizolasyon.com/ckfinder/userfiles/files/wuwaleguwuxa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=redmi+9+power+call+recording
    • 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_off0000cd48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD48 16792 bytes
font_01_sfnt_off0000e55f.bin
5a3ca3f27b2777729a752f4b4d9f2adfca97b29e1ac8202eb633ea18a71a0487
pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 10888 bytes
font_02_sfnt_off0000fe57.bin
ab67ad9d9f19578365ba1f4320fdc25da2db639306ea3de3792351d972313bcf
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 18880 bytes