Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94952ef6fb9707e…

MALICIOUS

PDF

75.6 KB Created: 2021-09-07 08:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f460a05d49cdf180d0d956fef26c1ea9 SHA-1: 3e5191f78816345810a2dfacce9b448ca7d9e104 SHA-256: d94952ef6fb9707eed54de02c12fabfc75181a2fb7d061d81d1f3ed66ad79ff5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to disposable hosting or compromised WordPress sites, suggesting it functions as a link farm. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://aftckwt.com/uploads/file/44707197961.pdf In PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160831c51f2c15---67110700116.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b883742e74a---badudavulafemegesez.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/2l5fuusrlvfhvit4r0ehcmgehh/15086087183.pdfIn PDF document text
    • https://hostmegasoft.com/calisma2/files/uploads/9911883527.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/69042730948.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160759d795149e---kabezetaza.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/vosipomivotabekana.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/702bdb49f409e2a7d3ba4bee5217c7a7/39291961802.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/60191646080.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/aea6bfffa6a0250ac09faa0863965e25/58706106004.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/kisaw.pdfIn PDF document text
    • http://blueyee.com/upload/file/070256327577.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/71494403134.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072afe15a72b---78069948576.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/tuzokevoxora.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/iwagiwotomalik.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/novikekeguwenerisitudak.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a46b18f1675---vojifejunegukagob.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838d57ce43a---56385037345.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d0dec5a2ca---51120072570.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/78510120959.pdfIn PDF document text
    • http://guowangcable.com/d/files/62837579055.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/221cfeab254087fcad0efbe80a11ef67/zitesafe.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/b4911042ddeb2a0af4f83d475e03c7ba/kujiweminerowaxibobukifuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ways+to+deal+with+anger+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC285 10968 bytes
SHA-256: 7f2404255707aa1ae1f74c1575ff80b1c7516e1bf761808e3433f3c7fbd2ab77
font_01_sfnt_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 17520 bytes
SHA-256: 2b478d38afc650f20f099c74b0dae37efd46f3ae725c4776ea913ee65893a61f
font_02_sfnt_off000108b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1