Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7da334a317e724…

MALICIOUS

PDF

91.0 KB Created: 2021-06-25 15:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13a7c02dccd9ffcc384744a09a2a88c4 SHA-1: ef96d6100bd4cbda7f5b2da93f55268483e4b99c SHA-256: 9c7da334a317e7240440d0f2b63464a2db2a97142c92e872aa3eb40916c16170
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories. These links are likely intended to lure users to malicious websites for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cc952584733---kowapagudunobokiludaloz.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c853f9f1da4---dopujomaraxusilijaxofolo.pdf
    • http://speaklifeiamgreatness.com/files/files/pilemezizodofojala.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8a934fe2e---29900771555.pdf
    • http://apricomm.com/userData/board/file/6986968279.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/5118f056980e8a91826a54fe8a3fb800/96386072495.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fd65ea77a---84270852179.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/5d9142784aceffe4f7738176234c4110/gepokesevesosodezef.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/ed9dcc1b0c0d1ea083e8f0509de945f4/desiberotuxojaweg.pdf
    • https://2acontractor.it/images/file/60827766592.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/40517548685.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/15abimnapi9f8cpvua2gg5ehcp/molikebatilusemiwu.pdf
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/66350734677.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/009853ce01e62ec7c7678b97616a9591/xokasexitigakebibakop.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/44ad565bd6a59b7acf34f45f213bb031/99736365461.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b67859d4b---11481141498.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b891ac75ae---lixefoveramesi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=avid+one+pager+examples
    • 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_off0001017f.bin
404afd8006fc904a49ffba3b0f87c4ae76ef969b6028ace33bbc5cb8d6a9be4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1017F 10784 bytes
font_01_sfnt_off00011a17.bin
e7f0efd8e744d39347dc97cf3588d3f4d542b6585f8e2feb4d5be93824e90ce3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A17 17032 bytes
font_02_sfnt_off000145ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145EE 16792 bytes