Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e448110f7325ef7…

MALICIOUS

PDF

81.1 KB Created: 2021-09-11 22:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 969d7963194d23b57eed32ed7e23f2fd SHA-1: 59e6162aec5e9891553fa42e9c6007b23cdd4b35 SHA-256: 6e448110f7325ef733f5c246734b591eab1adf72e9a4d190f77db18363c7b2e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of these links and the overall structure indicate an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wyadonline.com/userfiles/file/27256240075.pdf
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/miremidiva.pdf
    • http://chia4kids.ru/ckfinder/userfiles/files/49146233160.pdf
    • http://tycoonmedical.com/userfiles/file/lulotetogasejanuvak.pdf
    • http://swotaweb.com/img/upload/file/lokololunotadimifakuxoj.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139965dc6d3d---toluxamosirebivatabuju.pdf
    • http://kajo-frings.de/userfiles/file/xujifuvelubel.pdf
    • http://tythb.com/uploadfile/files/fasulalowikamelisapole.pdf
    • http://hide-bo.com/img/tmp/file/34336296294.pdf
    • https://sieuthimayphat.com/ckfinder/userfiles/files/17608289168.pdf
    • http://colorfusion.us/admin/images/file/92251488180.pdf
    • http://tinhdauvietnam.vn/upload/files/66000194646.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b57964ef9f---lagamelirudazotuvezogu.pdf
    • http://33podarka.ru/pictures/files/58851228552.pdf
    • https://hargagila.com/uploads/image/files/vogatanupewow.pdf
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/kamawuxaf.pdf
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/bupenemo.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/072eba675b913df63554bd20933d67ec/tavasileponidow.pdf
    • http://solee56.com/ckfinder/userfiles/files/gafopojodolepekoduxomo.pdf
    • http://pobierzplik.pl/uploads/files/5335162638.pdf
    • http://struttur-arch.it/userfiles/files/mobavutimuzabipazonux.pdf
    • http://tomgiongvip.com/uploads/files/file/begusaj.pdf
    • https://organicfertilizerproduction.com/d/files/noramizoziwidasudawok.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161329c7c16b7f---85173912801.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=supernatural+nevermore+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d13d.bin
0d71d1909525d1dbed8d4ce45f53b4559b8f04761ee4f339421ca58c0dc3a629
pdf-font-stream PDF embedded font (sfnt) at offset 0xD13D 10724 bytes
font_01_sfnt_off0000e9eb.bin
0eb211460b15ef50cb945c4af4d3cb8fca2d978e7ba8ec94416fae585c4aad45
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EB 19892 bytes
font_02_sfnt_off00011e41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E41 16792 bytes