Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f79f7865d2e2a6…

MALICIOUS

PDF

76.4 KB Created: 2021-09-06 20:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 93e1ff8684c22bc92c46de021baddfe7 SHA-1: bc792f89eb0c44d6a8a882814d2c299c18d421a6 SHA-256: 60f79f7865d2e2a6d5d629a7eba3c4085dcc8163613f1172d00678a0e454de1d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, specifically targeting WordPress upload directories. These links host other PDF files, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qcjj3qjdnhgu7a2icp543teqp3/vomip.pdf In PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0933083d72---64474557633.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611d85c7d55af---rukofixavagefigaxib.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607181562add5---ludowir.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/23974411605.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/vebugorej.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/puzigorevojesif.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/dm390mr9lmid30kbmporenb487/48133936652.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/22524748516.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/hds2465jnau2ckujue1ii2l7q3/33585489027.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/rududafemadolotesofodugup.pdfIn PDF document text
    • http://kaies.cn/upfiles/210713173440700285mor2yt.pdfIn PDF document text
    • http://obermeyer-modemarkt.de/upload/file/xunidubexib.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/2677406327.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/sikaw.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/62300666956.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/sumumafizogezazixajupugi.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/zofilagimubenatel.pdfIn PDF document text
    • http://www.empresshasnoclothes.com/siteuploads/editorimg/file/gibutugogisen.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c827454ab---56759288939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=construction+of+autotransformer+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_off0000c638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC638 17384 bytes
SHA-256: 1f4fd0a23c19b40c0bbbe73af8fd5cfebdfc912e6ef56d3e1f74db3ff5ba0511
font_01_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 10864 bytes
SHA-256: 8a83dc253f85b05d9593a4e1379bd8cdf0f16cb474828b943ab83a738f292c44
font_02_sfnt_off00010c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1