Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c298338582d7ae…

MALICIOUS

PDF

75.1 KB Created: 2021-08-25 00:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 91d0ce275844a2b2b2f0b7b0ab1c71b3 SHA-1: 8e6a8aa9db09a9a1d882f11be7d2fbe3a8facf37 SHA-256: 75c298338582d7ae20f9b3d406d315d46a8848ef6ccd75c960dcd67fb199f695
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=committed+meaning+in+malayalam PDF link annotation
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d44b0fa602a8b25fcb85ebe8344f3ab/kenazefib.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/q4u2m4dlakt8dna7n2eqq58hq1/bukifapuwo.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4ki1m6nnimfc9185n9d9ab25b3/laveru.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088af8698b3c---gudebomidufizuzarikewo.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/45503569224.pdfIn PDF document text
    • https://anaksemut.com/contents//files/kuguvotavafelulibakejaf.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/57967054311.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/64839541384.pdfIn PDF document text
    • https://sibconsulting.com/contents//files/faxetopinigugepuzaxa.pdfIn PDF document text
    • https://anaksemut.com/contents//files/83001847482.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/fugizun.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/jivokinavidubexupogoku.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59750676172.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/df9b989520adb7e1253c6e2e92b3759f/xinet.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4df4bbd990f558af9d0a3d25dac7f34b/jinamugolowafak.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/nuxasifolisigudajifezasak.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/16240677603.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612440b1c14d7---43290480483.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/in3ashn7uj17meajjpcgog99ip/tovimoxiga.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210531_AEBCD13441F6CC5E.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f19e8734ab58330f4d3d62f3366fbf78/kiser.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/65107632189.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_off0000c3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D9 16076 bytes
SHA-256: 84dca6f5281e530fd95c1cef3099a4f142a537b67bde7bb07824aa88fbee894f
font_01_sfnt_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 10468 bytes
SHA-256: 012252211199aa3a45246683acf57d5d92d6c6277cf9b5cb3e43595962c0f5fc

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