Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc0397d049a49cc…

MALICIOUS

PDF

90.8 KB Created: 2021-07-13 07:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26bf6954d276fa4a5a3bb42bc5dd5e80 SHA-1: b710e70fb8b80548dc9ad332338068710c8c2ca7 SHA-256: 4cc0397d049a49ccc3c57fa563b30cfa19d698f173c12c644872403f634e3229
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm used to distribute malicious content or phish users. The PDF itself appears to be a lure, with the primary malicious activity originating from the external URLs it references.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d1f4b287a315552640e804d9d2103342/tugaluxavoxijegatoziro.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dfb9e37ae---20359682049.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/274aaf03ce7300b0ca9dfa4c12342153/notetudeberasejisoxige.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/801d180985539356da30f1ece4da6975/79307032857.pdf
    • http://jucal.es/images/file/40775487503.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/04219a8ca24b6a4a8a939070735f0fcf/14423746626.pdf
    • https://astek-telem.fr/userfiles/file/wularijejodudirexog.pdf
    • http://geriatriccarenewjersey.com/userfiles/files/fipuk.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/e33e025cb61c1cf4f3e60d2e7fae7271/97652388809.pdf
    • http://hakkabrothers.com/userfiles/file///xaxazi.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ca0ee95f22eba59bb5ee168a9e24c147/65856876231.pdf
    • https://canionglobal.com/FCKeditor/file/kipijoxo.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ed997cac---toxuluresetavofonatitokos.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160928649cc262---losufusijiwomezapo.pdf
    • https://basalyemek.com/ckfinder/userfiles/files/88245875234.pdf
    • http://standrewsparishhighschoolclassof1964.com/clients/70428/File/kimorefabenoxu.pdf
    • http://agendatourvietnam.com/hinhanh/file/lilojotuxikufolerisetor.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=all+the+sith+lords+in+star+wars
    • 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_off0000ffc9.bin
f94c3c86d89470650e4750a04a1c558c301a9640f5f9d7e01f24bdffe94cc423		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 17940 bytes
font_01_sfnt_off00012ee3.bin
cb2b8f8ddf189ecc5ecff7a32397adbe06a0be2dc8c483c6fd912c349b9eca75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE3 10412 bytes
font_02_sfnt_off00014681.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14681 16792 bytes

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