Malicious PDF — malware analysis report

Static analysis result for SHA-256 570ad25710472f21…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 07:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d0c8a3860576d7085f044beb91dda24 SHA-1: eaf4e0f028967a2406bc8fdbce8a82b3430e99f2 SHA-256: 570ad25710472f21008ebe5bd919d82e3beaa2e4a7f190e1075493c0c45d8793
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83403576401.pdf
    • http://tplustech.com/images/ckeditor/files/12699019262.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/abdf5912b2adca22a44aa1da89dff0a4/13368342384.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd634333489---17212207532.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bba5620752b---33304474179.pdf
    • http://ohmamakitchen.com/uploads/files/mavebomugeruludakonemado.pdf
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/nufemukavumedon.pdf
    • http://camwater.org/media/files/tajajakuwuwusewovididi.pdf
    • https://agencement-menuiserie-var.fr/stockages/files/87368811276.pdf
    • http://vattucongtrinh.com/userfiles/file/ganomepomorisugomo.pdf
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/gajisepix.pdf
    • http://4bx.pl/public/file/roxap.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/d9785a0f03c5476d2dcb1d873b466cc0/60905410732.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdfb5cff32---50261131300.pdf
    • http://pekingtogo.com/uploads/files/26253931720.pdf
    • https://thingstodobahrain.net/ckfinder/userfiles/files/79021221692.pdf
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/9806643047.pdf
    • https://shibbirs.com/media/files/23587744019.pdf
    • http://eraucheta.ru/uploads/file/gonivumenebagoxujezag.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/02a8ec9d40773104c60a191f212a0073/18450616046.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f29e374d8---bapol.pdf
    • https://istanbulbalbir.com/upload/ckfinder/files/79614146735.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qis784bmhdb9ff0f9kqgsdjte1/73040478620.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=exantema+subito+pdf+2018
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ff6d54764---83732887257.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_off0000d6fe.bin
6d9f7ddaea1ec0238780ec7e8111dff25eb88869b18f5ea21f461eb103298080
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FE 11340 bytes
font_01_sfnt_off0000f18c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 16792 bytes
font_02_sfnt_off0001099e.bin
0141f2111363e341f83ee0b1c9ab42f3bae0b1b6e161eda07e9f6edaa5fb6630
pdf-font-stream PDF embedded font (sfnt) at offset 0x1099E 19412 bytes