Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09e692f9ab14cc8…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 23:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16e8cc025bca734191a35b017ed53e9d SHA-1: 1399b314317b8bec8fbd8f406f85df56d5f07569 SHA-256: d09e692f9ab14cc8df3442245f9b2399a2c70937fe34754d3a583cbf9d11f75e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF document exhibits characteristics of a phishing or malicious link distribution scheme, as indicated by multiple heuristics flagging it as a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were extracted, the presence of numerous URLs suggests an attempt to redirect users to malicious content, likely as part of a broader phishing campaign.

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://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e62fcc7ab---xafumoz.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/ec9d4b7814dc5d13adcc86746a2d6af8/zibojudekovesupunolegisom.pdf
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/bademakabir.pdf
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/76254425521.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/23296041738.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074090909182---11743088423.pdf
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/50353652671.pdf
    • https://davidfoleyinc.com/userfiles/file/zafuguboxixilu.pdf
    • http://angarakshaksecurity.com/userfiles/file/74779277977.pdf
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/12976351171.pdf
    • https://eyetracking.pl/userfiles/file/jugefagosanuta.pdf
    • https://doxity.ro/ckfinder/userfiles/files/25574094913.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbc831bfe2---30747236131.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/5f1p7t4bmbs10h7bsg89ag2gq5/24034432174.pdf
    • http://short-story.ru/upload/file/98125364673.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a948b5a84fa---67171705650.pdf
    • https://fid-data.fr/app/webroot/uploaderfiles/50892293489.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f6c809563---52864111745.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/rtpofnsc5fm4qividkb2mbb0a0/xigego.pdf
    • http://studioguidobarbieri.it/userfiles/files/7886017041.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/4fb3521d4d6e7cb7865ae531c0c96794/11537314996.pdf
    • https://granitnet.hu/editor_up/sitojogog.pdf
    • http://newmanclassof1965.com/clients/4/4a/4a7b3a1a0fb21659e68ac19badabb541/File/89161821625.pdf
    • http://thietbiotovn.com/Images_upload/files/99088971335.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=honda+accord+coupe+2014+manual
    • 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_off0000da2f.bin
9b29a5c8073af5d2f88a16e7532005bcbd969ef789be11bd77e7fc6cf0c8937d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2F 17220 bytes
font_01_sfnt_off000106d1.bin
56edeee5fcb4910000f529aed52c36a1d945b947fe2e66b4b505da3c6e310c41
pdf-font-stream PDF embedded font (sfnt) at offset 0x106D1 10780 bytes
font_02_sfnt_off00011fa5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA5 16792 bytes