Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2bc09ed692cd87…

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 10:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 32dee098f7b23edbfbf7908b9fbae2d2 SHA-1: c2e7b6b9854d04c81f692ce5a3909f1ab82f9147 SHA-256: 6b2bc09ed692cd87dcbfc6b93b45bd5fefcbcad17946e2d17c320d4433c01f3c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristics indicate that the PDF acts as a link farm, pointing to multiple compromised websites, including WordPress upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64935272408.pdf In PDF document text
    • http://kapelski.pl/userfiles/file/bekir.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/52332457946.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/53880637744.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/kisikim.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/wejezef.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/gariboral.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132e863db220---28729577969.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/40111906665.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/82562468846.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/vurofaruvuzinevotekefet.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/568f44b60fbfdab236b085da46eab79c/jamijabepezogujedubo.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/ritibujekifuvuwujaz.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/73313925963.pdfIn PDF document text
    • https://tectrongim.com/uploads/file/poriwojevezemagarisegix.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132490503929---dowogukabi.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/tudanevipikufegafokava.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/taparalodada.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/zitew.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/74121026451.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137c35ac9cf6---zaladixat.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/33987642620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=games+similar+to+social+empiresPDF 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_off0000dd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD66 18740 bytes
SHA-256: e7dcda5073bd3f4241eb41f55fed7ea5b50a9424eed3dffd8f920be319f1b840
font_01_sfnt_off00010cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB6 10472 bytes
SHA-256: 794a9bee99bf2fb37499ce783cb032481c3c3136aaa547df8157c98dbc74bb2a
font_02_sfnt_off00012488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12488 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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