Malicious PDF — malware analysis report

Static analysis result for SHA-256 5269df2ea9ad913b…

MALICIOUS

PDF

54.6 KB Created: 2021-09-21 06:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9bcf120c042d15e0cab96d0773b61d98 SHA-1: a6ad9d69cd0bd52da031dbdfe734aa7d6103fc3c SHA-256: 5269df2ea9ad913b5ac08a431a2e3b6780b6c570b6dcef938743add44afc564d
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple external URIs and a URI pointing to a raw IP address, indicating redirection to malicious sites. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' further support its malicious nature. ClamAV detection confirms it as a phishing trojan, likely leveraging embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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=positive+word+starts+with+u
    • http://piri-piri.pl/ckfinder/userfiles/files/kavuvuvomubakusufezil.pdf
    • http://mwbright.com/upload_fck/file/2021-9-21/20210921075814305519.pdf
    • https://riwg.in/userfiles/file/gigixotu.pdf
    • https://happyjourney.webtrails.in/ckfinder/userfiles/files/58759513514.pdf
    • http://appinaris.net/ckfinder/userfiles/publics/files/botebab.pdf
    • https://beaszemin.com/files/25160643717.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/xidukuramejo.pdf
    • http://budka39.ru/files/kisumixabibe.pdf
    • http://yoron.net/up/files/bamonajok.pdf
    • http://botosani.ro/img/uploads/file/gulobamipora.pdf
    • http://naturalmis.com/userfiles/file/donisewugidizaporuroxedu.pdf
    • https://karlschool.org/uploads/files/202109090929176303.pdf
    • http://maydemtienvn.com/upload/files/wedagatuzemodamivisiw.pdf
    • https://adesso-moosburg.de/images/file/19389707914.pdf
    • https://tl-systems.hu/files/files/80805648789.pdf
    • http://scuderieverdina.it/scuderia/userfiles/file/76912637890.pdf
    • https://mimpishio2.com/contents/files/65059732214.pdf
    • http://reliancefla.com/admin/images/file/vinolabedodonugisosij.pdf
    • https://eltonltd.ru/sites/default/files/uploads/40049388104.pdf
    • http://naturalfurnish.com/userfiles/file/92588516013.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161474a01f262a---sisolaxaf.pdf
    • https://stomatoloska-ordinacija-rijeka.com/files/70497768964.pdf
    • http://xmzhj.com/UserFiles/file/mevaw.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c460.bin
2ad60dec9e4b9398886cede98b92d3199d8e33e90e302a260c9447c84bb72a7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC460 10448 bytes