Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5a47acfc4e6e4b…

MALICIOUS

PDF

72.1 KB Created: 2021-09-05 11:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1477fcd6ad2d493381819f01c9b93346 SHA-1: a63e87a60dfdd3824e1d459416fbcfa1da5d5777 SHA-256: fc5a47acfc4e6e4b675213b991d0ccded95a8e9f45138b8a5806d2e46d6643c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations used for hosting files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd790555d3---41926372397.pdf In PDF document text
    • http://greenplanetnepal.com/userfiles/file/zanufevadukidibizi.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/gosurolozum.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/xemadivukimiwenu.pdfIn PDF document text
    • http://billcolletterealtor.com/clients/e/ef/efe7172bdc9c6addedf700543cb5cb37/File/40358751300.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/38959480608.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8440994f03---xapewunulakowavanal.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/14754867183.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/41854926189.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/84693342237.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/37269311020.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/5680721489.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/55781420420.pdfIn PDF document text
    • http://cezanart.com/userfiles/file/ponujuto.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/jabodakurulifuluwit.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/kasabumotuf.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/gavaluxurimolididu.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/m24t96uhiohnvbagsmkjstlm8i/dagamewefoz.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/91840165966.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/modobufilodesofugisorom.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/4587010486.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/6ak7bkns94l04igi63pgbeg2fs/80181147942.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/af7866rer1jq9kjdsmq4tjg3f3/83934701760.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=tension+arterial+en+embarazadas+pdfPDF 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_off0000b9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B0 15664 bytes
SHA-256: b88fbee4e0f0a0067f8b6b9e3f8aa799d30b8813f0f2397d184ed4757e4ef349
font_01_sfnt_off0000e1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4 10824 bytes
SHA-256: 5da28b9575998d92710f113373f4bf3e928aa518bf67fd2b989e474dc8f8ddf7
font_02_sfnt_off0000fab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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