Malicious PDF — malware analysis report

Static analysis result for SHA-256 164205b98c1172ef…

MALICIOUS

PDF

67.9 KB Created: 2021-09-25 17:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8df399f59c54db324365de65ad336e80 SHA-1: 94222db8a098cc1479fd95c991efbc505ae9c382 SHA-256: 164205b98c1172eff21099a1bc7ba83df5ca8ec4cd905c8c49f66e09fc5f5911
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as a phishing trojan by ClamAV. It contains numerous embedded links, many of which point to disposable hosting and appear to be part of a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious websites for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4355

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://medvor.ru/uplcv?utm_term=corvus+rom+redmi+note+8+pro PDF link annotation
    • http://bfcy88.com/uploads/files/zibewemovagavelijep.pdfIn PDF document text
    • https://borsalino.ro/imagini_ws/jusumaxul.pdfIn PDF document text
    • http://www.springperfect.com/upload/finder/files/57629569405.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/250436383099.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161476914652bf---bulemalosakedutevaludab.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/fegekedimasatovonetob.pdfIn PDF document text
    • http://zzquansu.cn/d/files/fidubofijopir.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/satisafurufajoxetuw.pdfIn PDF document text
    • http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/wezigagosi.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/venorigapuriwafiwadok.pdfIn PDF document text
    • http://webcertain.asia/contentupload/fckeditorUploads/organization_/file/69700313781.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/laratulenimixo.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/70278444700.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/xugipizafixilud.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a446baacc8---nutegavekasev.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/bojiralinawefufidato.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92143607195.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/29314174465.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/pokemifowagawivazed.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/zixoviwuxiderebebebugoj.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/93552672377.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/81832132110.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/21123186944.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/viteguginanopuwusoko.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/16034638242.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD161 10752 bytes
SHA-256: f5881aaa310ec808342599afc2a5c88a011bbcdd0c1808863062a4ad1902f355

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