Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b29ab2252b8771…

MALICIOUS

PDF

88.5 KB Created: 2021-07-17 01:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1703fa75176cbd40b583215544844e20 SHA-1: fc68cf1260513c695d68eb4746866f207e423471 SHA-256: 53b29ab2252b87717893e8b30b492e0e73aebcedf3d4b2c6d5918f4773c42e5c
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution scheme. The presence of link farms on disposable hosting and compromised CMS uploads suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/21447895160e01b9a63bf1.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075e9a64483b---garoro.pdf
    • http://morgancountyoh.com/userimages/28247404469.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/db5eb8ec9c05ac6b42e747e1ef3a62d6/jeloka.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a040c0896---32200600097.pdf
    • http://facyt.com.ar/ckfinder/userfiles/files/61729544738.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7d7c5ce2c4fd1148fc9bdb3ce3f8ba02/vebofevopilal.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085a6111edc9---37447515103.pdf
    • http://schokoladenfontaene.de/idata/xugimivinopu.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/f13c7f5fc930cf831b7c3a60a4f3996f/49869546725.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/g73qv58jgtbjo5let66ul9clr0/pukaf.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1bb8b0653---rapanawisipaduvamozazu.pdf
    • http://katour.ru/admin/ckfinder/userfiles/files/pidujisugixasa.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/7d9fa1eeefcfaf20ced813168d379546/53493583511.pdf
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/37453118252.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/212238128260a6d4d737c53.pdf
    • http://www.elstar.ru/uploads/files/89687025928.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824a6f5d330---zefevabotowazunabomag.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7e9e1712cd8d612db3da4e661a0c1307/pevupowaxibatuvexibo.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66797dbf94---11210421908.pdf
    • https://fulzugaskozpont.hu/files/xovivumibokomudovupof.pdf
    • http://yngc.ru/admin/ckfinder/userfiles/files/51788264050.pdf
    • http://vo23.ru/upload/file/pokixumomitizejilax.pdf
    • http://agcslohian.com/userfiles/file/45865403832.pdf
    • http://ourdesign.hk/ckfinder/userfiles/files/3017600188.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=scrap+battery+price+per+kg+today
    • 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_off0000f523.bin
52c29e119537c83d7afc1044a0611685311cb38dce0d6daa3e19506b05630501
pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 10792 bytes
font_01_sfnt_off00010dbd.bin
d2766eecc6c013d4ba2666ee2b79ee448279fb711ecc76b9b7241e4be03419ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBD 17828 bytes
font_02_sfnt_off00013c69.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C69 16792 bytes