Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfe516da9490a81…

MALICIOUS

PDF

71.2 KB Created: 2021-09-01 22:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7d5c1cf3988826ec804743051ad04341 SHA-1: 14af30a8b1f00af84f91ede680f8b9a53c0ef26c SHA-256: ebfe516da9490a81b32f5c0af531665c4c0068faf629d10799500339c3970b62
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS upload directories. This suggests a phishing or redirection scheme designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://okwecare.com/usr/userfiles/files/danuropetimejukusivuluxi.pdf In PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dc259a726---tevuwisumopof.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/19085921041.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/57585653158.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/78042832677.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/gofuxu.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160820f0223b0e---fimupomepizari.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/26299151656.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/4f4c5fdede232186099526ee8a4d4539/25859872478.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/nurorosepudozanava.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e27b946573b---74552865477.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/76913283210.pdfIn PDF document text
    • http://didocrosby.com/imagenes/file/rifafufuzimorarugadoxazaf.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ce19b6cd37c---wasemamumabubirexumerobe.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/63196447899.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/puxizosijutewiw.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ac0b7d8dc9a066327a2b7b88d0b4aad5/98757115537.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b9a5d6482---moxuwewamita.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/85p1ddl9cd05nfkd9428dt4ebl/vapotoximubakaxixejuwise.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/23530525028.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/gifasaxakegugareruji.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/92985927174.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=change+the+fraction+to+a+mixed+numberPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB878 14688 bytes
SHA-256: 55f1468b5d17ba7a1c7857b22d9d954d5ef961404d7ad02dac665e274eedabd6
font_01_sfnt_off0000dd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 11080 bytes
SHA-256: a7e72f22f71fda565989b9eb3f873687a0bc9fd8ef1ff71193d333563714bcc7

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