Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd7b9b1c4fd4391…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 23:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 341ec80b4cc59af30fcca25521081d47 SHA-1: 16a0107e2b07460d4517d1a7a5cdd4a507e378f1 SHA-256: 9dd7b9b1c4fd43914998bc8a06716161644aa7ea0b2b8f7a0ec6a71984a55ccf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure victims to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crewmak.ru/uplcv?utm_term=best+sicilian+defense+variations+pdf PDF link annotation
    • http://workcoop.org/fckeditor/userimages/file/20210524140630.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/badexadad.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cb9031294---84326512640.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/gemolu.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f1b2aeefd62---jedemunidogukebedofirar.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/jelof.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd36535aa5b---75179745629.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/2745294848.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/85360306837.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/rojakimo.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f316f5864f---dapebekalupozetok.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b8aad3b9128---1442669229.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/ziruw.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7ed787802a05130cf4ddd5ad6d63ac10/35249916029.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/95503236104.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/0dcfdaa9845bfd3fe0d41206dde2e287/tivimudarolona.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/8b36addc7c3d410e7882b39879e40e1d/dadanefekekojexizin.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/wowusolosupe.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/gopizagune.pdfIn PDF document text
    • http://exim5.hu/_user/file/93076980632.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/beguruz.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607d21d8d368b---tixupagulisuromup.pdfIn PDF document text
    • 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_off0000d6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 10732 bytes
SHA-256: 2f3b7580663d2d4668a29536bf90d4519a09c3ee104e034c5fb40c8e9c57e2f7
font_02_sfnt_off000107d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D6 17532 bytes
SHA-256: 947e867c867601a7f4715cccfac82af8f51548aeda47e7fcf3deea2743e1f00a

Open this report in the interactive analyzer, or submit your own file for analysis.