Malicious PDF — malware analysis report

Static analysis result for SHA-256 c272a1ec67c7d76d…

MALICIOUS

PDF

74.0 KB Created: 2021-09-17 15:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d7e75d8522db59cedddf4dc0165d7b28 SHA-1: 0e957a370085392b16d3590dd7848b01f99a706b SHA-256: c272a1ec67c7d76df04d46de180d8557186f5967f604f11cad9480f902715d86
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to lure users to download potentially unwanted or malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://movimientofamiliadejesus.com/images/uploaded/file/goxirenixanurikasutuv.pdf In PDF document text
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/mewuzegigop.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/ginagene.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/zegunidamegovatudigexivib.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/8651119893.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/76864373640.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/pivisez.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/sitavizibupo.pdfIn PDF document text
    • http://inistor.com/ufiles/files/vonezopojaxizafumuv.pdfIn PDF document text
    • https://toocapen.com/files/78313863194.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132727854870---puvobomip.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/zojukekafanugudaguzogimi.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/73uq6geq4rfv7uocpto7cfn798/80613337415.pdfIn PDF document text
    • http://qdjshg.com/files/file/22317364106.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/sanagerokonelofetisanan.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/bupiv.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/gelotogowuf.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/43482558425.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/sigogej.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/bevavosireximorufetif.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/44061825961.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f379337b1f---29840415200.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/guzegatoxemafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=shareit+old+version+apk+downloadPDF 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_off0000c1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CC 10808 bytes
SHA-256: df187924522871918b7a6b05eeb1ff924bbeabd60cb51912743e0f9d565d8ddc
font_01_sfnt_off0000dab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 15616 bytes
SHA-256: 39c0fac5992df125e98031c78faa07392d586b30609baa4d19ece3fa12af62e7