Malicious PDF — malware analysis report

Static analysis result for SHA-256 671a03f085106fe1…

MALICIOUS

PDF

93.8 KB Created: 2021-07-01 16:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6ae4ecdf9da1dc0a96b1ef77db5a7ef9 SHA-1: 22f4b7fd4d7fca8709a3ce52e392099f853dc1ee SHA-256: 671a03f085106fe129f4b590d64af1f0c9e739495ea2cab1b77f7599149d925c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits PDF vulnerabilities to execute code. The file contains a link farm directing users to multiple external URLs, some of which are hosted on compromised CMS platforms, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of external links and the nature of the heuristics point towards an exploitation vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://doo-san.com/userfiles/file/20210512094440.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/66c12b67e92d9892319a628feb6e45bb/55962854726.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/32bb05b09ac344741e79c97c18f9ec26/48048684758.pdfIn PDF document text
    • https://ka-base.no/images_content/file/99959639758.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/73611498578.pdfIn PDF document text
    • http://ezibra.pl/upload//file/84580423095.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ca5rvtrfbgeagrn48mvhskpnrh/ferunojavititisurejemawa.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/mo07sl6kqdm105q2gevfl15h37/konezebesu.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/v07nimjun6vrq3lbu50jfo4k25/38599628004.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/84bbec7d85c2b19c6841ea4a6c02c757/20759381303.pdfIn PDF document text
    • http://demkapi.com/resimler/files/41277207473.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/2696575026.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/viranedeporila.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607717876e972---38506960096.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/89220486426.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/4902d3ecef5bea045513faed0ec5b114/82953696513.pdfIn PDF document text
    • https://oversaslogistica.it/file/76096585220.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e26aa20ba---dakizor.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/13365861890.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/87517859279.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd246d3cb9---92278781507.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4635d0c0b---42515827097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=document+based+question+answer+keyPDF 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_off00010ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D7 11164 bytes
SHA-256: 208213f75e956192ce9f2755c6fedfb2dee447507032a6cecf4600f2b9a0e8a7
font_02_sfnt_off00013cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC7 17468 bytes
SHA-256: 5a390461fec61999548b155126ccbb5d7d6eba4e2258041ecdcfb99d3bd4efb7

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