Malicious PDF — malware analysis report

Static analysis result for SHA-256 0602bf328a697df1…

MALICIOUS

PDF

84.8 KB Created: 2021-06-25 21:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2020f8425f07f7d5aaf2ce61cf2b84f SHA-1: 3b2296812206b8e11f00d69651ba0d863518b544 SHA-256: 0602bf328a697df1ff5d94505588c2df5a91209ce889d22c413e0a119301190b
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised WordPress sites, directing users to various PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the detection results suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/uq7vesuqi1l2dqki0u8k232hn6/marizuvozepuzeji.pdf
    • https://recapress.com/ckfinder/userfiles/files/nizavusefasikewofuvoj.pdf
    • https://ahreco.com/uploads/news_file/43020899051.pdf
    • https://goodluckfishing.com/ckfinder/userfiles/files/86564338694.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f7781faf4964827582a28260488aebd1/tepesorikagogefutaxu.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/xinaxovixezilurasis.pdf
    • http://jucal.es/images/file/pazifovib.pdf
    • http://prime-standard.com/piceditor/file/sajaxizuzezowivikamorofi.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/1391ebbaf0274a7f6583e3831f5a1215/91097480230.pdf
    • http://davidhammerstein.org/userfiles/file/88237394578.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160778c3886ff5---sikutidudesatoduliguveb.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d429a6d9e0---9853911395.pdf
    • http://dgjst.com/upfile/file/notimoxiduzagobuvefisib.pdf
    • https://agrimal.pl/userfiles/file/tobupisuvawetot.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a396b8e3160.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/36dnimihrs70fnb41nd9ql478f/kesanobo.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/1b07b50ff41a854f88692f9496ad4eb4/83610465615.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/ib3d3327m5okmouqmcsj4vdr64/35876505249.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/6715d8f0da41014845d0d1405df98dd3/mebudawanadawuwepo.pdf
    • http://mariamozharova.ru/uploads/files/fabopijoxeti.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/518b8b30902d27847e83cc3b7d513d3b/zofevotemigunuxo.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/6898016355.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/b7b82fb7d281551cbe3ec43aaace314e/mevudowupigevetivaw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=office+365+save+as+pdf+missing
    • 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_off0000e7e8.bin
189318bf91bed6f6d68a8e93cff3010734c7241f3acc6f16d82c95e01d3dc0bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 11164 bytes
font_01_sfnt_off000101e0.bin
f48254150c26e5c355d215e2ec9fd47517b0d125c2e2d0a4d388a4561493957d
pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 16856 bytes
font_02_sfnt_off00012db2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB2 16792 bytes