Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dce1be333b5a4b9…

MALICIOUS

PDF

69.1 KB Created: 2021-09-27 10:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ff6fa1591ca258c35947ec138c364dad SHA-1: de96484797965eb1833942a14f0bfee3a618d7ff SHA-256: 7dce1be333b5a4b9d5c257c196bcf95b96e96b4983221e38941372cddf8abddc
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous embedded URLs point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://philabc.ru/uplcv?utm_term=the+world+2+apk PDF link annotation
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1614c651e2cefc---30435042163.pdfIn PDF document text
    • http://alituncer.net/userfiles/file/sagetebi.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c889c324da---xikaxoz.pdfIn PDF document text
    • http://partiaweb.ir/upload/files/kuxojibujigoba.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/tugusukebofesit.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/35322033932.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/kekuxeburalaboboruzig.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/67725326346.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/82822057966.pdfIn PDF document text
    • http://lex.tj/img/file/legutenomofoju.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/59350426775.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/misasone.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/tajamavexatum.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/xopapukugadokopekeb.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/58860536664.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/nojofaxosugewivad.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/8490542ec53dad06368534289bdd65b9/8585750689.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614811dad0eb1---bulabofekarezod.pdfIn PDF document text
    • https://diphong.com/uploads/56817841984.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/lufenuxiwaxadavofatida.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/fuwobubiboxalituwufad.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/66455937231.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/bexosunizeroxukuzuledalux.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143eb62464dd---64918856023.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/welisinufo.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_off0000b14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB14F 10288 bytes
SHA-256: f9be02219ef934e4c2f81448ca4ffa8362573b3482ebac2d76109cac053a929e
font_01_sfnt_off0000c8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 15216 bytes
SHA-256: e63d04966cfefe95c47a4006eadb186e397ed04e73340e1456993502a9faa542

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