Malicious PDF — malware analysis report

Static analysis result for SHA-256 196f0f609cfc14e0…

MALICIOUS

PDF

76.5 KB Created: 2021-09-05 21:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3be06174aa46061a8e29d2e68ab7ced4 SHA-1: 40da078484f2e3b8108161a511cbd8efe16b9a0c SHA-256: 196f0f609cfc14e090b03e4d7b3ad0e1940ebfe58d8a371c830de72a59b9e148
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/bumomijate.pdf In PDF document text
    • https://ihotel2b.com/upfiles/editor/files/94111176049.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/64280819335.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/51820620998.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/4afaa0a5b786a199f8f5947bf2d10d0d/91286088394.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/288smibjdiqmv1bgvl516mpu7b/67417892262.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/93241dc72c580f8a2d60c9dca7086a8e/52349009220.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116f0f5ead19---85762605214.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/44063021682.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/96078880992.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/54818135702.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610b754ae3eec---gepazudobaxokemotuxejit.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/51963729472.pdfIn PDF document text
    • http://atomleasing.ru/media/File/92793720555.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/vimfe4b7ujvtbs9fqdq8mg4r1m/23532381755.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/woninezejevetupov.pdfIn PDF document text
    • http://ausafe.net/images/art/files/zusotusekodonezofoxix.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/remevo.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/59426059597.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079638e44f8e---dasaj.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/bujikuxirorofiwufaj.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/jumulomote.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/42a8e29f033c3af80d527b314e8c67dd/62833230015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=garmin+vivoactive+4+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E1 10508 bytes
SHA-256: ae977c6daf712d41a12eeed2c5e9520ed60b664651f81eee955a2dd5a8b3877f
font_01_sfnt_off0000e1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E9 16732 bytes
SHA-256: c8f8c23f9f29c1ef5245d6c9750324e783e6812b7829bde3cee26b44dbca3c50