Malicious PDF — malware analysis report

Static analysis result for SHA-256 884ba24f7f37ed65…

MALICIOUS

PDF

89.4 KB Created: 2021-07-01 20:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 35029ec1a2ac2d2077f3fd1dbbe32c57 SHA-1: af445c561f3016c7cac172162e9fc2500f942867 SHA-256: 884ba24f7f37ed65f475731064d23708c016bdc5e168170fe9979cf2af71f385
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to potentially harmful content or downloads. The presence of multiple links on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/9f62ed548da4bd300a4a813bb49ba853/25382641293.pdf In PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/pokaluredekanevuvobelaruz.pdfIn PDF document text
    • http://firegallery.ru/img/upload/32432169044.pdfIn PDF document text
    • http://rld-carbon.ru/file/lawezojegokar.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/fobagaxutusuti.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f09d2872f9---sinuzi.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/fujomoje.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba7587ebc3---44318818878.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/38528620427.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/t1ek25evjk5d653misc0uulq86/kafumarazimidevo.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/91295675643.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/nuvatowokujurekakowe.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-6-10/20210610061559255308.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8e6e9638c---87005042070.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f42e820f4---49816554971.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/fosebavipufisewudos.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-3/20210503080346312819.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085afba1a1c1---58577873577.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076ca1fea5f6---43455508031.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/41903013214.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/0dc8a42ba2c2aec986dc8a132e00666e/58955621881.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/76649517664.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/47812870887.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/33d36e3c10b078d954b44bac7b052c91/30337825337.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=sentences+in+simple+past+affirmativePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 16676 bytes
SHA-256: 66c505d5fe269525d8e167861e733d7de78d8e62d10b31a24a0e5c4a63970e5e
font_01_sfnt_off00011107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11107 16260 bytes
SHA-256: 7b1dd8b18a7f683344fa3d53d165235129faf14c20b7fc85309d363fe79e3708
font_02_sfnt_off000126fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FC 10664 bytes
SHA-256: e4c9323fea11f49e8f3d4c74c20267938c81827e18b7ac0a22ae1462989b9bdd
font_03_sfnt_off00013f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1