Malicious PDF — malware analysis report

Static analysis result for SHA-256 30eb44f82cd42f7c…

MALICIOUS

PDF

78.8 KB Created: 2021-09-15 18:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 25748b743395bb3e35a264c58b9c2f24 SHA-1: 89b3fb231170a659668ef7c80a2ab08d9820599c SHA-256: 30eb44f82cd42f7c91fca97d6179b2ddb293591654d7c4f24301020f847f11be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF structure itself are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://queure.ru/uplcv?utm_term=telugu+books+online+free+download+pdf PDF link annotation
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ed56781ca---23109889554.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/66318690820.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/kuzule.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/20664727632.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/35053780214.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/74771582738.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/67035678635.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/fujagubuxinimar.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613253c3ae579---44846659814.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/31263352321.pdfIn PDF document text
    • http://mobil-tech.com/files/38571769626.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/99400812331.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef971399c6---13421299630.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/9508445215.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/titekovoke.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/cfc0db82f2062862faddea8f31a59e6f/33628451798.pdfIn PDF document text
    • http://robedecreateur.com/img/files/zufivijatabopemipito.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210909135601.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/41462953203.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/bonifavibavorudijotetuna.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/karegopolaxeb.pdfIn PDF document text
    • http://villacappuccina.com/userfiles/files/mukemapupa.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_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 10956 bytes
SHA-256: 9091aaf213654c4d1a7eaed7b25ec603e591f1b36bae54ca0ad2c162daa92cb1
font_02_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 18956 bytes
SHA-256: a6bfdb468cfce239bd634b03682ca0a509815ef5fb1028e6427177e2c672d3b9