Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2717c77f9996ee…

MALICIOUS

PDF

75.5 KB Created: 2021-09-19 13:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 249dd11317e76b0a86e11e13c8a86532 SHA-1: 7fbae09a9c0eb6e7a873171a195f1a41090be3dc SHA-256: 7b2717c77f9996ee71dad7eceac0bc31770051e0fb7d2fefdc83dde40e767e91
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was identified as malicious by an ML classifier with high confidence. It functions as a link farm, containing numerous embedded URLs pointing to external sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting an attempt to obscure malicious activity. While no scripts were extracted, the structure and numerous external links strongly suggest an intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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 http://www.neoneofitou.com/ckfinder/userfiles/files/zosugavokuxazano.pdf
    • http://vetcarefoundation.org/userfiles/file/tabij.pdf
    • http://santeh.md/img/files/pejesipirunimasejanitova.pdf
    • https://vespaclubcagliari.com/userfiles/file/paxotedirinuxezegogit.pdf
    • https://etadelloro.it/images/file/kibafukizabibozopo.pdf
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/40601843466.pdf
    • https://0924055971.com/uploads/files/202109010615235497.pdf
    • https://tktravelkorea.com/FileData/ckfinder/files/20210903_941B2AB28DD44E1F.pdf
    • http://mnarch.it/userfiles/files/xagevawitowimun.pdf
    • http://www.ondebiz.com/userfiles/file/95709332861.pdf
    • http://almar-bus.pl/userfiles/file/9815424863.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/7e8aa6dc6d46db5713c7f11320a49050/finatidize.pdf
    • http://schodylux.pl/userfiles/file/82884650621.pdf
    • http://handsonmontessoripk.com/userfiles/files/77009318742.pdf
    • https://pianoinprimopianofestival.com/uploads/file/jepikosofopojalafigomaw.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161405776279b2---27546882025.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+fashion+is+trending+2021
    • 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_off0000c38a.bin
b5dce21cf271b54a7b2852452d0085e58a83209ba49ac601a4b73942ec465693		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC38A 10876 bytes
font_01_sfnt_off0000dc8b.bin
d59016ee0012e994724667c063b64a0d6d2a1534a91facd52502771354e9eaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8B 17004 bytes
font_02_sfnt_off000108a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A0 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.