Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd1b3b4036f9453…

MALICIOUS

PDF

73.9 KB Created: 2021-09-03 10:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9ceda865ad5b006be31c3ed5db7b8d1a SHA-1: a1de68a2ac8d20ed1f7f450f1e5c25765141a9e0 SHA-256: 1bd1b3b4036f945394a1ca11e007a9907c3984de7f86b3a795c99d5c9d85486f
156 Risk Score

Malware Insights

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

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of numerous URLs, many hosted on compromised WordPress sites, reinforces the attack pattern of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ee0477c0ff704de598afd9003ace713/mikepubobokesuxipasibo.pdf In PDF document text
    • http://jncs.kr/page_data/file/20210625125956.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/7013005931.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8dd48c75a3---razedapamosi.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aed165da8c---gataka.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/562c7c634e62edbd4c1013ed4128d4c3/wudigide.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/5c431a2f110531420c9ae20c89bae72d/dexiz.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/guxifixiponozaba.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/palexagaxodivelotip.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/6d2e2b8e39046c76d95903680c9a6d84/88256529668.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/wenel.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845ed5b18f1---vefosirejuxenisen.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ce979450aec---96775575873.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/8758193652.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d45a6d9c2eb---vavazuka.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/zateronabotipakumotat.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/xejudetekaw.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/banedirelabadazi.pdfIn PDF document text
    • http://zonweringbelgie.be/ckfinder/userfiles/files/gositinewufulemav.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210623025502.pdfIn PDF document text
    • http://izdo.org/img/userfiles/files/zegamawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=moods+of+verbs+worksheets+pdfPDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/fofalevafowuxapilamosul.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_off0000bf4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4D 16840 bytes
SHA-256: 7568c80c6bbd2fc45a5246b3e5719e2a298b85651aba5c048c8a557a167ee6bb
font_01_sfnt_off0000ea22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 10568 bytes
SHA-256: 6979b6df5890a09b25accda7c332b94913e8a73079ac47a0066ac275c72d8583
font_02_sfnt_off00010242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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