Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b32a9624fe9d1a…

MALICIOUS

PDF

81.8 KB Created: 2021-09-08 06:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d0ece4b1a16a2db08e7b69f1eb239e3 SHA-1: 845016bf4c1aebe429b817977634df80d28232bb SHA-256: f3b32a9624fe9d1a04f7219b621664875290ff395920034ae97d1c5667d27435
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • 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://drafthe.ru/uplcv?utm_term=paecilomyces+lilacinus+nematode+control+pdf
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/kevowilasiw.pdf
    • https://egyediajandekotletek.hu/mvc/userfiles/file/piloxipedivelurop.pdf
    • http://elhammagazine.com/ckfinder/userfiles/files/42838169557.pdf
    • https://ilcaminodaugo.it/file/wezukojebutabakabikus.pdf
    • http://notarbrazda.cz/userfiles/file/15342980663.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0673c2c6fe39429a6955535a73a21e72/97705450226.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/97be44f669f9ab48034e585e085aa97f/giwibetidanil.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112e9788f358---7959347562.pdf
    • http://gadkowski.pl/repository/filemanager/file/53654578876.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083efa4f27c2---bomomuvaniwoni.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160764409a76d0---vogopaxegonebuvezoruro.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/f0e4kn7a8sjh650iofkd8lrn1e/60697134526.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/peu2pv5o213mki88gs98tfqf7m/ruguxufotogutoru.pdf
    • https://willmarareachamber.com/ckfinder/userfiles/files/49727190639.pdf
    • https://flying-vikings.net/UserFiles/file/46606768696.pdf
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/85399685664.pdf
    • https://brianspradlin.com/userfiles/file/xojud.pdf
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/8198449305.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130197d94da7---bitadujugo.pdf
    • http://www.tekkoo.net/images/library/File/9172806556.pdf
    • https://drsaman.com/files/foliwukawiv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ab.bin
a310ffa912bfea810ce1ba0789d296713fdabb7cfc1f3c8bb858a0f10153687d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AB 10996 bytes
font_01_sfnt_off0000f331.bin
da5a922c8d2f35fe667e6d994da5cca99eccbe7ca9debc5dbcd85d9bf2a9b28f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF331 17656 bytes
font_02_sfnt_off0001214d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1214D 16792 bytes