Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd74d44b6cdc5574…

MALICIOUS

PDF

69.1 KB Created: 2021-09-26 04:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4d1c3e6c93f272d392bff807c008474d SHA-1: 8e6574ed3c7d8789779ad76685698d4d62c45472 SHA-256: bd74d44b6cdc55741a3bb64efcf48219c6dcda065f3c4482941a3eedc5b30403
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://www.terresdescaraibes.fr/file/xelefinutododisenolebo.pdf In PDF document text
    • https://franchiseinnovations.org/broker-site/files/files/22450909322.pdfIn PDF document text
    • http://cityfate.com/files/files/befivasuxofurodo.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149f116e4745---polivazifotakowejuwe.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/xagulejekozekewogegatupa.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/mesedokuwotifupuz.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f990fd8d5e---72999590102.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/73201593260.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/83140409863.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/tibepeme.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/4063845473.pdfIn PDF document text
    • http://kftchem.com/upload/files/fidelalafobud.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/kakiseluwakedig.pdfIn PDF document text
    • http://heichapuzi.com/uploadfile/file/66718946745.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/43744651686.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/92503940291.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/2aea14cb0f42bbe701430dd6948e56ca/loxovabanupe.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/vosew.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/poxozunazux.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/netagivugejotedexedimoz.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/613637ee8edaf.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614173a7359e3---pivibaketod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+transfer+mobile+storage+to+sd+cardPDF 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_off0000b09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B4 11036 bytes
SHA-256: 1b4931c3e6ae5faea2e33419fae90f48eaca2b5a2974cecf21ee3b0bc123d1cc
font_02_sfnt_off0000e22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22E 15008 bytes
SHA-256: e63c66cce9d31717a2d0bd9dc1142a5e580089e6141d763986555f271ef8b7b5