Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee9d21189cb095b…

MALICIOUS

PDF

89.6 KB Created: 2021-07-07 12:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6c4943b66c8e77318c741eb3389a1e1 SHA-1: 91f33e2a089f36d4274fe1652af8e7670b4f9596 SHA-256: 3ee9d21189cb095bda5f35654fe105c23d03daf2c723e9e21d705590d0e5e452
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to host further malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly indicate this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac75c71a480---giliborukene.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/7ee66857d4c71a60ccfee84f7474c203/piwazeravilabumozuzogufe.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/n5qnfbobtnuutr9ujvf5n9gt1g/50959700104.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/efb7e7599d6ad7ded1c0d2f09de1e049/22902493304.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609426d23b021---jeguveze.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/4cdec11b0d56d6b6fff830024533d462/tewusofiviwa.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7270106fb---69657245636.pdf
    • https://dcoderesearch.com/uploads/wapesi.pdf
    • http://lhsclassof68.com/clients/73441/File/febokagazirosi.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ec20kclruqme5ut3b1qs7i6tnk/zevadesofikasonaru.pdf
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/38551857162.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608adf741a8ad---wimisewuduxuxamigisam.pdf
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/41436515928.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b845d454---45498787751.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c223052bdf---22289173542.pdf
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vaxigipozuzozulani.pdf
    • https://vestol.bg/files/file/57251687946.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/5961961gduejm38kv687tu1f43/79673476311.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2750cd1397---solopisulonudomuk.pdf
    • http://yilip.net/userData/board/file/nobavewigexavusilibagi.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/e270984c6a6780f768e89a9a3d4ec742/76403182723.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/virazuwegugadawe.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3eac52777---25516081816.pdf
    • http://lawrence-spruill.com/clients/42275/File/texixebisisumijabut.pdf
    • http://kccmaul.com/files/files/38550995427.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=going+to+the+two+step+song
    • 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_off0000fc21.bin
e38b6d1edd8e3817c2634550111f42d5c09bea9c1aeddfa8417c8f59ae4aec3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 10348 bytes
font_01_sfnt_off00011387.bin
1b6093c3683d045a45fb8ac9e00c1a6d9875fb3ef799f318f10d30678569f496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11387 17312 bytes
font_02_sfnt_off000140fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140FA 16792 bytes

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