Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2decbc432b9058…

MALICIOUS

PDF

83.6 KB Created: 2021-09-21 05:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2048af2396791ccaa15d67ee0c25dfe4 SHA-1: 6411282c16e1b076941a8efc5aafd0baee424b00 SHA-256: 2a2decbc432b90581b3e5afec4c4b19cc7420382397ee2dfbf0e1fec2c329b88
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The presence of embedded JavaScript and a high ML classifier score further support its malicious nature. ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ytbozhuo.com/upload/file/011345091755.pdf In PDF document text
    • http://lycee-elm.com/userfiles/file/76795218192.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/72293672484.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/42228234950.pdfIn PDF document text
    • https://migger.dk/userimages/file/rezokejazevalimisep.pdfIn PDF document text
    • http://e-district.org/userfiles/file/84702556026.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/masutenasixusijadiduwusi.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/69988459629.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613895c02db6a---rupiminukejorazofuve.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/texasisoso.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/kagufelisamesefusadadiv.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/dajepodekitixinemi.pdfIn PDF document text
    • http://flomogroup.com/upload/files/zigewiwamodadikegelo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d9c602bb1f8ce86f2aa4bfb239c27124/91786850285.pdfIn PDF document text
    • https://servicepapik.ro/files/75211724776.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/tajagemuzozozasalin.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/vusajojovekuguwugulexubu.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/57116800204.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161393c4899405---kiluzedupipuvigizasif.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/e6hjqumiffpp0o8l4m1cfk46nv/62150572732.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/jezezegigo.pdfIn PDF document text
    • http://geoman.cz/data/file/poxisuzej.pdfIn PDF document text
    • http://mestav.sk/uploaded_images/file/guwowativufabipajarejorad.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/63733761765.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=a+doll%27s+house+part+2+script+pdfPDF 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_off0000e354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 10848 bytes
SHA-256: 4b0eea2021d45fce01f73943411948bc534f3d8b85222ee814b4e331060e791b
font_02_sfnt_off000114b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B7 16920 bytes
SHA-256: 7f723f0dc894341889855056692a0082988c044264fe148c2d176658f3cf1cbe

Open this report in the interactive analyzer, or submit your own file for analysis.