Malicious PDF — malware analysis report

Static analysis result for SHA-256 3246b3a19b249fe5…

MALICIOUS

PDF

85.1 KB Created: 2021-06-29 02:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64720618ff46069a3ea6c4f595b193be SHA-1: 67c376078b4d67390c0a6d72cdcbf5704c4f7461 SHA-256: 3246b3a19b249fe5e65affc955baf2d17dae1f47df35dbbf23ff8584aeeb1bb5
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent. The file's structure and URL patterns are consistent with a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/7062e9c770937e8860f2c6b207109143/tamotogifinixosaletufepo.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/5644e4fdafe3fe51998cebe2fd8b36f7/mulumuwoxotuvezetizeg.pdf
    • http://alexlunacoach.com/img/editor/file/1118549496.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/a9915b4f584507498548ca572862f92c/50867817103.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ffb6f89e5800435400f373a41f42a889/54251162118.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ofe22c39kfbs82v58g9029lua5/85596821258.pdf
    • https://alice-immo.com/userfiles/file/18002236493.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608219ed6e5e0---73792189525.pdf
    • http://offerseir.com/basefile/offerseircom/files/gorutene.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce1b90ef07---12406558728.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073ac681b345---71637073760.pdf
    • http://vvk-wiedermann.at/userfiles/file/jidajemodivetokum.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f8be7a703---gejarep.pdf
    • http://zatacorp.com/upload/files/weribe.pdf
    • https://fcksa.com/ckfinder/userfiles/files/87737360358.pdf
    • http://hkalc.com/userfiles/1605551878.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38dc37b94b---99628483108.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/osjt9ek3agcilirp9hd8p88hl4/wavesixa.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/09688f5af7b8653b118bcc5f510ba5bd/vawuwaroxutajuvidorejube.pdf
    • http://qtjdb.com/UploadFile/2021/05/18/file/20210518_153540_176.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/2tdk9ue7o06n5vrj9fd1fj8mh8/suroxiwoju.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/f7nbi0ij9020ddpl10lfraaqdq/jowisuxetenivubawabovupa.pdf
    • http://porpora.biz/imagenes/imagenes_contenidos///zabegunafusezer.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/dac17a01395ddc1f4b277d5903308d9b/56256095177.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c7d6e386c---11063431002.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=subscapularis+physical+therapy
    • 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_off0000eaee.bin
5e164fb9d137f3228fd33823c1bf5758ec966512a9f6fe6d2476b19b0d953de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEE 16816 bytes
font_01_sfnt_off000116be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116BE 16792 bytes
font_02_sfnt_off00012ed5.bin
297847e01d258e8899d10f1789570d374e5f8b59eee44b6147588626f199386c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED5 10676 bytes

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