Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ca6d48c5fc45f5…

MALICIOUS

PDF

71.9 KB Created: 2021-10-01 19:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 90cb67114081d187e24b5d8f6829d5a0 SHA-1: d86845b11ce6d4c9bd7d321dc0a6c919b80c0631 SHA-256: 00ca6d48c5fc45f5ebcd437200607e72757b036eea45ce69df803c92e768ebf6
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147195081ecb---rujakebov.pdf In PDF document text
    • http://foxgraphics.paulsfashion.in/files/fegafivuxazutep.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/demogodulawin.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/lalovirixanafepuj.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614dbaccb4068---3601295882.pdfIn PDF document text
    • http://373113.linker.tw/files/20682567604.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/69942958274.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613174f598799---mesivojemuv.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/terebawepa.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/lufimeko.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/karedo.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/87f0352b0c3f2f2ed50c852717a577d7/41262690744.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/76538135040.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/31216772158.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/banabij.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/85309956676.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/33749503363.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/wofobajesakun.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/bilupojivisinorirawejuj.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/nugawufoguji.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/kuduxupexaxumuxazux.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/nanusirukodek.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150dfeadc447---levibuwopibepunimupum.pdfIn PDF document text
    • http://taperagi.com/contents/files/tipusaxulekusosojadi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=jav+porn+apkPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/faxebekukedumeri.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_off0000b50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50C 9860 bytes
SHA-256: eb9e53d589a0452b67ac2087bde8b8e7dd7041bdc4e0930f4743d54f12077d85
font_01_sfnt_off0000cace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACE 17984 bytes
SHA-256: 129314c33b8bb7a5fa833bb74c43049544b2039d3163ed162ff2c8dc1d652327
font_02_sfnt_off0000f8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1