Malicious PDF — malware analysis report

Static analysis result for SHA-256 073e11e0c3ccc1e8…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 22:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90b7d5c54553667ca9aa77856c9ce3e7 SHA-1: c5129fa4ef8330771e16e0b1ee2bb7382b23415c SHA-256: 073e11e0c3ccc1e8e0efafbc9013cbbd977b45d24be2731f2aba7051fe486179
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites hosting further PDF files. The presence of numerous external URIs and link farm heuristics suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b56d89dd88---zikosapavusom.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ed997cac---toxuluresetavofonatitokos.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/7pf9u7p5vmjbu06nnmd3oe7ip4/90555535657.pdf
    • http://daugiavanthienphuoc.com/media/ftp/file/binajazoterag.pdf
    • https://balaji-technology.com/userfiles/file/18171382158.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cacad05ca9b---jilivobekikufimukutope.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1afb7a99fc---dazatibaparaledov.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/bo48p86bc10e3buct5v5roprov/68212100361.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a97cf0da7a6---jinuvugaxeduba.pdf
    • http://ggmtc.net/userfiles/files/58791592051.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/eun98bf59uppu1c2r9uid7n1no/15661532552.pdf
    • https://ilmercatinosottocasa.com/file/28046713508.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/721jgg79sn0jcs9hsn96ejkaa8/vemewizut.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe3384567a---noribapabidafudet.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/f505a8fc39265e720b8df9f5bd7d8938/75271752267.pdf
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/74176519815.pdf
    • http://pillshop.ru/uimg/files/66235002164.pdf
    • http://komputerzagrosze.pl/userfiles/file/kefozakego.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/fd2421df2472r2okmavpgsp69t/48331046347.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083b9d6478f7---89267853496.pdf
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/64525416376.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/15n7anqvh2uvmbaosgdug14iib/58401929468.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=parks+in+maidenhead
    • 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_off0000f3f5.bin
8938c401576d8f46d05a1153dc4e2aa3bb0d566790708d9dd33da7940a70e20d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 16672 bytes
font_01_sfnt_off00011f3d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3D 16792 bytes
font_02_sfnt_off00013754.bin
43f5aacd33af06ea12a0249187b6891b3e5cbafda452d50655c4d6a305e5d4f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x13754 10340 bytes