Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbeeac5b4aca9ac2…

MALICIOUS

PDF

88.1 KB Created: 2021-09-19 01:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4f8b3e9d396337ace44bd9378b55c31f SHA-1: d64bb8c7f083538c399055bc115fbe3ee74e2732 SHA-256: dbeeac5b4aca9ac2d84f7a2aae88998b2c5d49f0618087ada28d58f1a3fbb3ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.champagne-cornevin.fr/ckfinder/userfiles/files/9008407249.pdf In PDF document text
    • http://narcisse.sk/editor_uploads/files/80345868955.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/lipurasiko.pdfIn PDF document text
    • http://parfumland.sk/upl/18048605246.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/fosemevidami.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/68054022917.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/vulufirowubekekeveral.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/24222483055.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/24532826299.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/65274129685.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/19378855646.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161465f7086e12---77752252797.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/zemoraxite.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/02fca0850ff25dc6a2b6d6957dbeec5a/gokifiliwakimabojo.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/91614145221.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/foluwofir.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/3918066208.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021090718342873499.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/zugifukigazapa.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141144727b32---mikaxizujaj.pdfIn PDF document text
    • http://yjccnc.com/upload/files/22154864226.pdfIn PDF document text
    • http://floralojistik.com/userfiles/file/kidudukulojane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=naruto+shippuden+ep+158PDF 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_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 10916 bytes
SHA-256: da2e770c3a1d104215fb7e50239e641a6ebbc29b98174657f9d3720891db4b36
font_01_sfnt_off00010ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA2 17444 bytes
SHA-256: e73dcc179ad1651b0cde3145c66f15dd4583f3ecbee001b34290da752c8ed1e7
font_02_sfnt_off00013982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13982 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1