Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc453ed04f3c526…

MALICIOUS

PDF

86.5 KB Created: 2021-09-04 16:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 245fedf97def78d86679ebda6448792c SHA-1: 7f0cc0fe3de1d4c2897fa3d06208d08172d9895c SHA-256: ccc453ed04f3c5268904a7d8216fef81a990c2687dd0732cb937cd7c140418e9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, likely to obscure the true destination. The document body is heavily obfuscated, but the presence of PDF_URI and SE_CALLBACK_LURE heuristics suggests the document's intent is to trick the user into interacting with external links or calling a phone number, typical of phishing or scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://pixomot.ru/uplcv?utm_term=lr+baggs+para+acoustic+di+manual+pdf PDF link annotation
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • https://actsonics.com/uploads//files/202108021851533234.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/33089753251.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad460ab10db---nuwarumokijiru.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/66876388593.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/dabiju.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af3ab5f632---89678888723.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/wujevipavukomizin.pdfIn PDF document text
    • http://velisend.ru/photos/file/sabatipalirotok.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/dovalibobusosakoj.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/sizupalovofewapezisaja.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098708a61933---92442176198.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/38737885008.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/5a2078c6dd7b83f610bc193d08877ae7/gekikitoriwuka.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d21fe9408---xudupulobokutifazato.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/nawuwodulozigefivig.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/g85jb78isr5lntf951gf47oavu/51504630064.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1627388006.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/ecb25a27d32802b0c75b1b82d7f1ed45/96794852293.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/40937598848.pdfIn PDF document text
    • http://hkwwta.org/userfiles/20653569236.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a9e7a6f14ce07fe40332c6f85617b80d/suridunuloxesetax.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807b85d0d07---62226863711.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/en8mkpscvugng5bjl9a0hvsqtq/jezesise.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160819d9690ab6---gulevafomubafoxuvetalumi.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/lh9mq584113kr6s8a67s5b68s2/49682271149.pdfIn PDF document text
    • http://rc-modeller.se/images/file///gokipi.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_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001030e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030E 18348 bytes
SHA-256: 8e9e3a34bcede07661e9aceabaf63dcd864a17c65f60159c51aa55d22caceb08
font_02_sfnt_off000132b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B5 11028 bytes
SHA-256: 7211be550aa4a75ef5c9c54253e49f76768bca4f60168dd37e19b90bad2e5766

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