Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b3e4f195b21e6c…

MALICIOUS

PDF

80.4 KB Created: 2021-07-01 11:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 951702bd2c5e1520d788dc0370d190ec SHA-1: 8990114fa9025745b638c10510cd65cb6a6f52ce SHA-256: b8b3e4f195b21e6c46f0b0e70eb9114679c6132af0a6b9766d8fcb7d65e49375
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=2pac+all+eyez+on+me+full+album+zip+mp3+download+free PDF link annotation
    • https://iuoshili.com/upload/users/files/bojizuwadalaritetatemado.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/65670759411.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/81568183009.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0ee3898f---tisofuzojitifamaxabige.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/46278034065.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/47634255902.pdfIn PDF document text
    • http://naucseto.cz/storage/15449169252.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/49e58dc16729382f436a01ae262e0e04/legoronewasovatukuz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cda52d640---napinesolalur.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/2454e013679c756452627b21e8d08556/davixe.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/zodinovewunawovivuvatul.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/fatomobafuramanubitusi.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/48608479193.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/2vdljn5819qkc0cjmic34k2so6/29777984796.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/87129114623.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080c26194ea5---37770788349.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073488ca8afc---jamatulewisezak.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2d1246586---89522220576.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085567cad797---segijejababodefu.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cadf5a2c7fa---10560851265.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/9e7f1dff8b9a893ac084530a9217ec0d/vakudif.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/kanamuraralilanakivupeku.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607556d2a1292---77118324396.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e0a08b198---puginez.pdfIn PDF document text
    • http://poorclarescork.ie/images/teruro.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/44805824798.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51b1055d51---61734037219.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_off0000e853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE853 11208 bytes
SHA-256: 216cd1a633dc54a68ab5d84e8666a21bec86a1e188c854533d7a9d4322e5d437
font_01_sfnt_off00010278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1