Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f5620f8daf5c45…

MALICIOUS

PDF

69.0 KB Created: 2021-05-14 13:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30da3b1ec0c818d1c24b4b9e02f7bea9 SHA-1: bada7a3ca3fccd946e14c609e9cf490090668cef SHA-256: 46f5620f8daf5c451bb053f0018f7a1007e1145f72a67696332ac1d4e1c86470
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on compromised websites, likely to distribute further malware or phish users. The document body is heavily obfuscated and contains no discernible user-facing content, reinforcing its role as a malicious intermediary.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608943e02f930---56000828916.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/fed70d4452d321f1f39c83e1a3c52071/31266798838.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/c8827d460e1ae2458ad5d8807964036f/sitokosaxaguputuwojar.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/f666b1a75705ec7d93b05091f129cf30/zemubuwufajimexekup.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/6b0e98c006747276fd3e6f04987a6229/44947546209.pdf
    • http://garderoba.sk/images/_file/sivogakelononuwabofitoga.pdf
    • http://teplospectr.ru/images/files/dinen.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/8be9454d9bf1e99059dab3a9546b89a1/61748348602.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7552669e0---dagipexax.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929f214156f---77945893786.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607209ab83ddf---43040065367.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160801a08a4a07---lubafopewew.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160832944eed7a---zobusajuvumokonedafewixi.pdf
    • http://www.annaleehuber.com/content_files/file/zamulipulifesida.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f38857c907---72064238441.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607c1d97897b2---zedurijonizurokizovit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=bootstrap+grid+system+templates
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c715.bin
e33da0e95e8d15e547e7271294bfac8351953800273bf721da8b441d9519ce43
pdf-font-stream PDF embedded font (sfnt) at offset 0xC715 5428 bytes
font_01_sfnt_off0000d97a.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD97A 1800 bytes
font_02_sfnt_off0000e208.bin
93a7287e44af134ade8bbbbeb275cdfbe2927256aefb0afe972f84eefbadde04
pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 10692 bytes