Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ff34b99140197f…

MALICIOUS

PDF

74.2 KB Created: 2021-09-05 16:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 58ebd5a4142782b5494dfdfc05293e2b SHA-1: 9da41920ab95aaaf275f15e5258dac45e99dd762 SHA-256: b4ff34b99140197f99ca294a877b92f1c44529271e8704925a944c0354670c78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a3845ff11---pigagezudagavule.pdf In PDF document text
    • http://ateliergermain.net/sites/default/files/file/rugotirolog.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/62442087819.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/52318419625.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/38367391530.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3039dc0ce8---pedineda.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/lamifup.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/ee52ee4c7fa3de0a4c532cb66bd3b71f/55440359336.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/3e3c44dfbf90c9f6eeb787e636d096fc/19627907006.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160897067d891e---98484159277.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/vuwitonew.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/54495553290.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d0337907f5a---napagaboxaral.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/qosb3h3h3i3034s4m0nl04afgc/bufexawanidusivediridifop.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/nopole.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/71447770740.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/67699904893.pdfIn PDF document text
    • http://rayanchem.com/d/files/rijowomovixawamuzerek.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/25377543373.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608155a141485---gikadadimibipe.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/5396378617.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/46cc0c64c5d42d779db76a86ba3462c3/zikejobelidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=sigils+of+power+and+transformation+pdf+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD89 16920 bytes
SHA-256: db4db97ebd07bfe5c8fd91c316abc6e98bc6ff52f7deed74d63e09cb4f37685d
font_01_sfnt_off0000e956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE956 11004 bytes
SHA-256: d1124493c6010383b0a25e1211147bab064194424d117c35f11272271729486f
font_02_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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