Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeae9a16cc0b6520…

MALICIOUS

PDF

75.9 KB Created: 2021-09-20 02:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 11f30d0f7b92f1ab1b6e71f7dd8d5da9 SHA-1: 1ac5a78a23afa6460765f906eb716b30b3ba4c74 SHA-256: eeae9a16cc0b65203e487de098d4d655f4dd37770642e79148eccf4c39aa3e24
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one specifically pointing to a URL containing 'uplcv' and a search term, suggesting a potential phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed to host many links on disposable domains, further supporting a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://queure.ru/uplcv?utm_term=final+fantasy+tactics+android+mod PDF link annotation
    • http://wojno-stal.pl/pliki/file/kusoxabid.pdfIn PDF document text
    • http://belv.ru/userfiles/file/tiniveratulovuko.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/zugatutexezif.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/75545272518.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210916_5ABB075C933C5D75.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/17824439020.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/90278503622.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8e55d23a2---gujano.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/8463301030.pdfIn PDF document text
    • https://profm.hu/files/file/salobibowa.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/jisaremevumuxer.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/regojilajiwuz.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/gakepopowakefeli.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/duvuzodimo.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/kilaxeba.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/xikerasuxe.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/mumiloso.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/zesitubareritegamet.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/revagiv.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/lulokavinivilelefozeka.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/91331801821.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/57208499141.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16143e16c4f272---51727338024.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/doxedapef.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/50658341447.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/netero.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/23793481082.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_off0000c518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2F 10596 bytes
SHA-256: f2854cbd93e9ce2f4fbb27ad57b0a51f676f6afcf959d5fe2e3c486159f6252d
font_02_sfnt_off0000f561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF561 17220 bytes
SHA-256: 880db0a92b545d3f9079bc18621ece9025cf66dc987579fbaa4992863bc85cfb