Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0b605129843004…

MALICIOUS

PDF

75.4 KB Created: 2021-06-21 06:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a1c7d9c4cade8293dc3c15c593ca048d SHA-1: 7b0100dccb6eb04f358a45c1e31995a5f26891c8 SHA-256: 2e0b605129843004494415c2d375a38ec880d33382ea27db0279389fd28f4831
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to other PDF files hosted on compromised websites or disposable domains. This behavior is characteristic of a link farm used to distribute phishing content or malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

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://roweryelectra.pl/app/webroot/uploads/file/16234978143514.pdf In PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/00d84f8e9caba1ce3e7885daa8fa817d/dujakuxokamirumop.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/gowojefazusoximorapakew.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/xazoxanajejum.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/witozurowogufe.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc4d871a0a---18430508998.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfcf5ef2b0---ditusasexatixanirufasof.pdfIn PDF document text
    • http://wurbs-hanau.de/userfiles/file/56225902617.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/d6riu436h06ih4qk76ha63u8fh/28432128019.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16074c28b7c013---fajawejudu.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/ba8f44ac7854800001d1e0bff9657618/gabagupufetan.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/52103449196.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2ab6a55ce4b73b8e02657e61e812c6b6/47534612867.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcb9109869---pasavuloroj.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/22659575096.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16085df5d7e31d---1186254471.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wogojiwakonimetexugobax.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/f6rrorfmj7gi0fn2ub8hm631f7/wemepovikoraboxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=karuppan+song+mp3+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 5504 bytes
SHA-256: fa2a24f43bb1d2bab05c9b59853ec7b54c77c6d9e96da1a24143eb45d429b403
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 10892 bytes
SHA-256: cd0a35987635c0349e0d6aa461d5ec00c6d265d26c6367755defb9e1dc7db197