Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b932482b5639fe…

MALICIOUS

PDF

84.8 KB Created: 2021-06-30 11:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f7be0d463206e8b95ea052968f0ae4d5 SHA-1: b3d1343ff7dfbba4b0e929be1272fc1aee313e3c SHA-256: 76b932482b5639fe9da9b5753e8ee5252cf70ee52b32263d0bb3e0bdf5b1b10e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to distribute further malicious content or phish users. No scripts were extracted, but the PDF structure itself is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://synerhu.ru/uplcv?utm_term=god+writes+your+love+story PDF link annotation
    • https://asthasupermarket.com/userfiles/file/meruban.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094f8c34cf48---rotozetuvixofalevimolik.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160714aefe23dc---27903602295.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/zodinovewunawovivuvatul.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c5e1acf0b---1090736621.pdfIn PDF document text
    • http://whatdwellswithin.com/file/80027868062.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/q4vf70n6ene2jsj3jbbvmvbo1m/38808254199.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/dibiz.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/9b17ac8fbdb5ee1ac8644733ff3b92c1/96170678137.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729370613d1---41561934671.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/uqr680rb3qp990e60cq6uq7mg1/fexigeliroti.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1624357615.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/wamilurenoxugutodu.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/biwesigugeragalexipubata.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d9595683c---xigilugatewaf.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/kepivoro.pdfIn PDF document text
    • https://hagepoorter.be/files/files/povanegebunilufobevesegaf.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607087622d249---64075816704.pdfIn PDF document text
    • https://motacademy.it/file/35907805760.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/989e20e1ea99fa78a11172dde39ea1da/fedirejijivolomagelopoka.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d62432e606---jisefisofugexemazinowiv.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/tukibodilap.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/23074f04337f5968d17fef8b364345d6/16704871774.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_off0000e96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 17516 bytes
SHA-256: 2e1eee0acc4d0108be87e512f03330208b600120d9d388ea464cc6368603ba6e
font_01_sfnt_off0001167a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167A 10380 bytes
SHA-256: 22f6962a895520c2999d64aac07686043bbe467d80c3a6589e28012af63e7ef9
font_02_sfnt_off00012e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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