Malicious PDF — malware analysis report

Static analysis result for SHA-256 674438b9838b378e…

MALICIOUS

PDF

76.2 KB Created: 2021-09-20 19:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 26883ede60424b6ef058a0fa505c22af SHA-1: 0212db1717a028c90fa84ff8c02e4304a5a47b77 SHA-256: 674438b9838b378e5241baf14f5c38693ce6e9fdf2adeda406dcaa4109d8d6d7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to potentially untrusted domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is used as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7792

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://derechosenred.org/aym_image/files/meruwogisojeniwiwifuk.pdf In PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/61320839318.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202109172014464845.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/61644011995.pdfIn PDF document text
    • http://shopcode.ru/uploads/file/16845497332.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/73998898431.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/lamekibijufijawajogelosex.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/8236031357.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/mekolivol.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/36568061583.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/zezowiziverekokexovu.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/49405981721.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pipozapopuna.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/gegufujegegevovavodimiva.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613013fab37d8---88538302732.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/juzonotigunabusejisi.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/dabanaloxuzobatideje.pdfIn PDF document text
    • https://nasco-ye.com/uploads/file/8752545589.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/98087788950.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/ridalifarerizasu.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/tufimaziluku.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/selajogenumavavutoso.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/83391763752.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109172050154024.pdfIn PDF document text
    • https://panama4d.com/contents/files/razokisat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=video+app+no+watermark+apk+downloadPDF link annotation
    • 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_off0000d6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF09 10532 bytes
SHA-256: 2fea8c3198b12cf6e189d46c7f8c7f43e38ec97b970d22770dd8375c82d55885
font_02_sfnt_off000106ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FF 18544 bytes
SHA-256: 0835f6cbfd8991d61f71ebaa827d2927b55396a1f09e7c92a3cd3507516c2c90