Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebece6174c620d01…

MALICIOUS

PDF

91.3 KB Created: 2021-07-08 01:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 065b764a0ce6be47f515a302cf6d6351 SHA-1: bc06334fc13d531f683a46802116fab16c0ce600 SHA-256: ebece6174c620d012991c29606badb2a99a19d0877a1d90c6127a149fe321f7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070474ab2438---naxufemufigimepomuzepa.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/8becf5b59495284e80fa237307166c82/kamekaxaketotenokiz.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5ccd32805---diwumanodavofizesavijom.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160970ba192792---bokixus.pdf
    • http://dui-antidote.net/images/userfiles/file/pixifipap.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc4e390811---96980317999.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/2197261247.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/i9tpr0kdi77fdf5dopi045dcbc/54572282164.pdf
    • http://architettoangeli.it/userfiles/files/58899797198.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/bfoig04ajgpu62i6llfje8clk6/fifanimukinanoxula.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160818d7e34d62---90587514995.pdf
    • http://whatifitspossible.com/ckfinder/userfiles/files/xawidaxijikuzososi.pdf
    • http://littlepearlbooks.in/data/eimages/file/jogetelitepobul.pdf
    • https://braindevelopmentmaps.org/userfiles/files/69909113315.pdf
    • http://movietek.vn/hinh-anh/files/71072285027.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62ccc54c00---75245286435.pdf
    • http://airconbank.com/upload/fckeditor/file/72727284586.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985e4e849ff---wavexufavafedeki.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0fe785c73---lukisinopinadowo.pdf
    • http://france-ex.com/images/blog//file/46957020469.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a881fe216e2f81105d2a38aaca4c67c8/xokozudapaxawive.pdf
    • http://staresecurity.com/userfiles/file/tekeboto.pdf
    • http://haniltm.kr/upfiles/editor/files/72696646578.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/b283366dvf141u2l3a9he1jubt/29932638415.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=fire+as+hell
    • 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_off000105a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 16792 bytes
font_01_sfnt_off00011dbd.bin
b1af7f8d48b895bb0aff74e9d19f37b65379dfef4eb0300a73b2d529b65f931e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBD 9860 bytes
font_02_sfnt_off0001336f.bin
64ffc1be842d3c4de607ac758b13e0890d9aa2acf502193b823418e962d4ce4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1336F 16776 bytes