Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c37589ea90968c8…

MALICIOUS

PDF

77.2 KB Created: 2021-09-05 22:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1c6674aea12eac3631bc49603872858f SHA-1: e9ad20463f0543748d12a360c0eddf23462eb49f SHA-256: 4c37589ea90968c85e38787cb5d3c7dc92a5d90f4a53f54a052e20962e327c0d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains embedded JavaScript, which is often used to initiate malicious actions. The document's structure and embedded links suggest it is part of a phishing campaign, likely attempting to trick users into calling a fraudulent support number. The presence of multiple compromised domains and link farms further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=molina+healthcare+new+york+provider+manual PDF link annotation
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/litasiwolonojapu.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cb639b52fa7---nufefokokiwujomizoma.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/divoxutixokobimunedobuto.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/2635957392.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/cac4fd6317c7a7c325072ff837cfd32a/lewozedesevugesus.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/951ea42de9d00f04b0402ddb1b156d27/pilus.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/98742040325.pdfIn PDF document text
    • http://a-pluset.com/userfiles/50944403075.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cce0197c0c1---sunawenibuseritupal.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/6081914028.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/789a762851475e1dda2fa5e2d2c807b7/97083124862.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/91375609233.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161027c84c36e3---gosatomipadagogivu.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/gowinek.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/89859665516.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/jixiguvekoxa.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/kaxebazezadazop.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210724235349.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/nufolirexur.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3abdb9562---gewaxedil.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/pixunagofowonone.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/44644000014.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a792537b896---10040723318.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608be9fa95657---33477407739.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FB 11060 bytes
SHA-256: 6448c418d690be85c293687cbd3bb22bf4ae43242568dce8aff07173f577f362
font_01_sfnt_off0000df97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF97 17332 bytes
SHA-256: 9b1cb8fc758c4075755db04aea54845b99dc120a5f6b6063686c96d5b8b6bb94
font_02_sfnt_off00010cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1