Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e07cd47e09cc5be…

MALICIOUS

PDF

82.7 KB Created: 2021-09-20 06:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 066e2af30f319f96863e5e13dd30b95e SHA-1: 4233ce1732be98828bf35be709fda8e05155b54a SHA-256: 8e07cd47e09cc5beb0aee3c4bc3c6ca6d37c85c54016bba2aad0947dd23f1b47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://salon-urody-bellis.pl/images/file/kimegowixudizinosub.pdf In PDF document text
    • http://siciny.eu/userfiles/file/zosufujowidemozobemel.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161353bc44a719---90827996372.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/ganedojov.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/witibufulabodijez.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/jowinididamadedinoveka.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/nimugipubew.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/51076350921.pdfIn PDF document text
    • https://12shio3.com/contents/files/19191810201.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/r42s9l6nfr9vn4b44lkljgaafs/nifigubadejexozo.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/gilavumit.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/161345c68aa2a8---kowapubusezewu.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/8306080972.pdfIn PDF document text
    • http://suaups.net/userfiles/file/47983586736.pdfIn PDF document text
    • https://adikketiga.com/contents/files/44240774412.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/54040568151.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/temabovoviwa.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/381334efa696e7602083a4470446e9ce/79152641117.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/wupegani.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/39957143712.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/pokamejif.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/51097223387.pdfIn PDF document text
    • http://sswjeans.com/files/nagunituzo.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/zexizu.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/pilenakotaxef.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/kosofotosarigugat.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/gimogelolakas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=play+store+free+firePDF 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_off0000df9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 17708 bytes
SHA-256: 6593d2824b80cc202d363f9b4de708489e47efc4d9be19773fb0742d7e97e386
font_01_sfnt_off00010d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8F 10216 bytes
SHA-256: 1fd39e44d92f70c61bf641ff441c510aac3fdb51e0e8ca434010e5dd96824ca1
font_02_sfnt_off000124b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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