Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ee0cdf0ffde9e8…

MALICIOUS

PDF

72.4 KB Created: 2021-09-05 18:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fcd5323d14ebf30b7e473ad6a295f299 SHA-1: cc0ac7d068f205bf8a9dede25dfd11aea33cbbef SHA-256: 01ee0cdf0ffde9e84c978aae076a2cca3fc979e2d3b9e018124ede2e88abfc72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The URLs are likely used to redirect users to phishing pages or download further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://laborke.ru/uplcv?utm_term=linn+akurate+dsm+manual PDF link annotation
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/41df3a26f9ff1b81419855d4777455d5/93066811932.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/zarenunedob.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb864701064---26799518282.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/ralosa.pdfIn PDF document text
    • https://heyratacademy.ir/file/gafugepudemuwixozur.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1626380918.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8d6bdb559---togefegipalo.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160800965b695a---33007285317.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/f75c5a5537b5f286b263850438da354a/71390531469.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/72193503101.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/63405491637.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/fpp0n4e5p3qg4qi667285s01ud/26686565947.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e5a8a7f42038571067b304c2a5dcfbe4/80881813995.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6f6c6253d7e0996d6d9b27b63fb7c53/ruwejud.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-19/20210519064545364129.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/vidisodubilig.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents//files/39990310902.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf01d6ea588---zezepogotutemabojejawow.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/gowujajet.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5749b4dc5---fefadomumaruzo.pdfIn PDF document text
    • https://vpmemorial.net/images/file/16976565718.pdfIn PDF document text
    • http://0851gay.org/userfiles/202106file/2021062607040670554.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/17620797307.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_off0000b96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB96B 16572 bytes
SHA-256: 4e014ecd9442c110cd52532b5d41ab461e4c2011115926b9d3f9a63ef1443173
font_01_sfnt_off0000e465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE465 10436 bytes
SHA-256: 05a79fd9eafa50c3fb16e1c0a6a898cfb0db72d06260328fa9f110fdc2c356cb
font_02_sfnt_off0000fc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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