Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a69d198306f3bac…

MALICIOUS

PDF

84.5 KB Created: 2021-06-24 22:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b63789d5572e026a2fcb03a4c8b4a704 SHA-1: 17336840f0fa50422b46edaa9c2395aa56d40a8f SHA-256: 7a69d198306f3bac6577f58b685eea5fe23ec56ef451a185e10265a0101e050a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs pointing to compromised websites and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://smidgel.ru/uplcv?utm_term=alexandre+dumas+the+red+sphinx PDF link annotation
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a36ae3a06e---59419485503.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/2b06fadcb39eff8b47eb0c7641c567dd/59995823950.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e84c2c8829---15754760212.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf1409a53---fipaterapekekemufatozarag.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210613030746.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/11423623987.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfdaec2b6c---josasidonagilikufowex.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/26539690896.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/11119605845.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160bde42f7875b---zurokutobiwenoxasonoduxu.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/b26d31d3b59ab5cb8fcd6745fb2441a8/wutukumofijepimutopo.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/20798092705.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8bd0ad494---bazodilitelir.pdfIn PDF document text
    • http://proxima-design.cz/files/file/tusopurorixibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC6 5028 bytes
SHA-256: d10db7ba5e628949bc9fbe3ca2c69c875143b92c8be9ef8c3def617358daa9aa
font_01_sfnt_off00010f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9D 11900 bytes
SHA-256: d09bd7ccb9632a2fb6e5ef1e610906637237bb0b3f09de29f5608a9944c2f053
font_02_sfnt_off00013739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13739 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34