Malicious PDF — malware analysis report

Static analysis result for SHA-256 4726fba3d4c07a1a…

MALICIOUS

PDF

77.5 KB Created: 2021-09-05 10:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 318eb28d0434a2719e2c530b1b03ecc2 SHA-1: d7e7479ca9bc5c1e25bac7ab5222f43cde9505da SHA-256: 4726fba3d4c07a1a86c05245d8dc9a926efd589a9d1d1e94a37c09a6d3f55bb7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to potentially compromised WordPress upload storage and other disposable hosting sites, suggesting an attempt to host malicious content or redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • 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://2ds-creations.fr/userfiles/file/difelafowafuxowi.pdf In PDF document text
    • https://mimpishio1bet.com/contents//files/41717421783.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/71272909360.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/32180438067.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/26417323890.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/88461108990.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/680cf72b7e92c32ef9f536e5bfe709f0/55431489951.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/jaxekaweg.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/wivudividotunapotolep.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/59255400053.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/21621519178.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/6fd72ae5f6ca6381f985329b32c5e24d/guwamixunazamusejelixijog.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/51262836108.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/ed4a39f4bddd2fecc61b94acb287bf20/labujuposozi.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9747648722---79789619146.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/zabakedibimotuzetovi.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/d6d0dd2e83f7557c0728cac3705f723a/zazowidufidekefuvegem.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/a7a72312f10f6d80a569cac4123102d8/majuwuxunududufetet.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d8cb563c2---dolov.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/f451992332c7c2e58798d520fa16e0df/fobasanesidasisawewow.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/nixisejufezubisebixip.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/j9eg7qdoc8vcns6mq63mktlib2/tudowigizuzuwapavepedi.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/42381442961.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/16/files/pazigajinogi.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/9c052f6bde9a1703485dc21d802acb17/8810721581.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849eccb8565---pakozatob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=2012+gmc+yukon+xl+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_off0000cd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD18 10588 bytes
SHA-256: b6ac6ae74d90bc2aae0890147789f7090ab8dd7bed21c1ae1e03f56a4f756449
font_01_sfnt_off0000e568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 16512 bytes
SHA-256: f6be04b1f6490f45425afd137c3ce5c1fcc7be1436ef28366de93b6bd50cd875

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