Malicious PDF — malware analysis report

Static analysis result for SHA-256 004e961be68b2d7d…

MALICIOUS

PDF

83.9 KB Created: 2021-09-18 20:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0b8e1e52f6209ac66cc47cc53e430b37 SHA-1: 61ae4b24659ff589c4f77075eb920bb6980174f6 SHA-256: 004e961be68b2d7dcd7229037cbf6cebc139643297c18ad39c4fcbc50aacc9bf
164 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://attlas.center/userfiles/file/87275085693.pdf In PDF document text
    • https://architektor.ru/uploads/file/biwujezulajiw.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/xabafimom.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/90876129464.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/b9a73d2f4faf37f78e50f1bf2de0a4a5/mutunanozisowopobetuvove.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c508866f8---tifebezired.pdfIn PDF document text
    • http://chemsdano.com/upload/files/55900896938.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/jumavuzubesurolaruza.pdfIn PDF document text
    • http://afro-safari.com/upload/files/gusopeje.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/13706359695.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/45389181230.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/lesuxobir.pdfIn PDF document text
    • https://magic-ray.shop/uploads/files/xekatotakamufasotozob.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/xejakeraxelu.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/8fd7624ead6416642433c6d1d3b77111/figekowavu.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/mapefixupamapipuzobopaxu.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/zinix.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/91993401335.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/44959077850.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/53969898950.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/werajalelevak.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/10755415077.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/lavoza.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/98090686360.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=nawigacja+yanosik+android+pobierzPDF 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_off0000e0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EE 18708 bytes
SHA-256: 33e6ea456a39d089bb6233e9b4b7fe39593b21b7609d0ff9985be5f7031243b0
font_01_sfnt_off00010ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12810 11144 bytes
SHA-256: fad4289625ca3fab948a2b14f9097fb51dfe104b78876f0b916ecfe55164c076