Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd68f0872e7ff34e…

MALICIOUS

PDF

93.3 KB Created: 2021-07-28 09:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f4d1556b5c960ec8506d14e8a29a180 SHA-1: ed8c2b1ec90dbb8617468fa3134a06aa26a1ee27 SHA-256: fd68f0872e7ff34e885fcfd1636a19f1ea85b21ef3a00a367e95361d2b86f6f0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, with many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/berorujadik.pdf
    • https://questyme.com/userfiles/file/44709093125.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5cc8c6ca---85329265460.pdf
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/95752349524.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/fvaa3cjiu2roh1fvsv289g6rlq/19685227230.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/s607leluj9daojudcb76ms5bhh/wogetoso.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/70jbhc99kk0savh7rgqva3c2ru/wofivifitazuxifu.pdf
    • http://sadrainsurance.com/UploadedFiles/New/file/fikipedakosidekobi.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c85a10d079e---tatikojexupavev.pdf
    • http://mxm-hosting.nl/img/editor/file/94609448582.pdf
    • http://myarrahnu.com/mo_images/files/pefozupu.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940859eaef5---51132748498.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-5-13/20210513073311564942.pdf
    • http://haiphongcontest.com/images/files/56139582832.pdf
    • https://bettyloupaints.com/userfiles/files/4549588370.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d22f98401f8---lurojitofavovemurawirosux.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/ladexuvatigoxosakelo.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/9f2658756799d4ee151e481c4ce42465/13790915810.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8180de471ef3018b276fd42f069918fb/37665235251.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076339118d13---4771306161.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/8sra7t5uatrqvobdl3ercsvhq1/24046953305.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/9556912fe166734863e6a998e9111044/rotapujizelasuroloxod.pdf
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/mogefimeb.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/28f9c4ad587daf0e64dba4b526c4c6aa/99108119592.pdf
    • http://copy2d.com/ftp/image/file/zizakeropuxuwid.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/8e343bfeed1214af9ae9f7271e04e6c7/xebajatomijirudimipabipo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=red+lobster+specials+today
    • 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_off0001068b.bin
4b30b6cba7747fe67f49ddb0f2bff366acfe26d9853a730e54ea611a51188617
pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 10704 bytes
font_01_sfnt_off00011f00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F00 16792 bytes
font_02_sfnt_off00013712.bin
c996fc2f5c0dfa8b7fd4398856a4d1f29a7d0e325f25a1bd35b58cdd4434e4a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x13712 18340 bytes