Malicious PDF — malware analysis report

Static analysis result for SHA-256 068aee685d3c3783…

MALICIOUS

PDF

80.3 KB Created: 2021-09-09 07:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7b3f6384d9f0b750c4c2e0756c1305f7 SHA-1: f9cf6f8917f81a1cfbe2c44ddb4f25420b9c64fc SHA-256: 068aee685d3c3783c7a5de7729556ca7ee0f2b86a138019da188d82e9ed5d530
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The document body was unreadable, but the presence of numerous external links indicates a lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://ooobelkom.ru/ckfinder/userfiles/files/sefejalogamudawojego.pdf In PDF document text
    • https://floridagreatescape.com/media/file/vipaxenodajusowuraxov.pdfIn PDF document text
    • https://kiptep.ru/file/vonizekijusarane.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/13900752051.pdfIn PDF document text
    • http://alptw.com/images/files/75161703185.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/5922482915.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/mejazexamudezasuz.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/95614666726.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/10501973273.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304d4c02dbb---77086746348.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/pukazakilibigalixu.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/c833537fd362a092662c1c58560e7a18/95288721183.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/33399124939.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/xugapefug.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fb15ecdb9---bonumutitirirosajasukeka.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/47481234023.pdfIn PDF document text
    • https://slotpt2.com/contents/files/95788605515.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/xobewesesid.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/51397256804.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/pisiriwidosomogexim.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/25925819199.pdfIn PDF document text
    • https://titishop.co/upload/files/12087264043.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/45165526647.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/60969264392.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/bujer.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/66642203846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=temple+run+2+blazing+sands+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://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_off0000d519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD519 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 17048 bytes
SHA-256: 25269c9ba2656ee340876c35f2f4a24cbed7c00fbb885dbf55d680bab8f2d0d3
font_02_sfnt_off000119cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 11108 bytes
SHA-256: 2a118e4db3b0416f9a5899d07967883fbcc2cfe6e8493402c16f8cf16ffb4f81

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