Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c68767be383ae8…

MALICIOUS

PDF

76.3 KB Created: 2021-09-06 03:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcfc6da624ff4c525b66533b5814b7a9 SHA-1: a0d67fd035ec101002b532f6b6ef2d6e7c1d9b58 SHA-256: e6c68767be383ae8dcd01dd7b1bd31621c2de33b4c13a70fef6de0bdff95a9fb
156 Risk Score

Malware Insights

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

The PDF file contains a link farm that redirects to multiple distinct hosts, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns suggest an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/58028463763.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c420b205220---nelijomoso.pdf
    • http://tpokebar.com/uploads/files/26078066087.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d1cbcccba---dunupewoxomebasazanid.pdf
    • http://appletechsolutions.com/userfiles/file/2540848946.pdf
    • http://hoinhikhoavn.com/img/files/zimebozibakuvipeke.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/4a1dba604ee950d86bcb9610a1d2f34c/75713217585.pdf
    • https://adepotcustom.com/UploadFiles/file/20210812022733155.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8e69e428---5464715648.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5417a7d541---zemojuwumurimasebilebew.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708f60d99fd---36731812011.pdf
    • http://paroissedementon.fr/upload/files/rozepidofet.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/3088191d958cbc8541630b3842b6c252/mizixifibibud.pdf
    • http://marcobernini.it/userfiles/files/zaxazazajabozavisedewun.pdf
    • http://antifftech.com/uploadfile/file///2021061112585224.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a3cca8930f5f4b2edc9c4c4889e003d4/ribubezu.pdf
    • https://propactionvehiclesuk.tv/userfiles/files/luvesirupu.pdf
    • https://successalpha.team/upload/files/87660626354.pdf
    • http://vitacanes.com/uploads/files/tafasajoxenuxenaxaxokuxi.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdf5a0a24f---didopupezomobinulofuduje.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/s9nai71qqqgs1vsjsgi7p4mrd5/78259144818.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb82972308---potubusaxujuliren.pdf
    • http://deccanquest.com/konadnew/userfiles/file/zukafifekomo.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9e1f2c36b---rutilelorugofe.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/84a7ae2d7e7841d8a3101244f439e8a3/wunebamizuliverewakeridub.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/5n3k7bot2rr6djba67pq9305pq/bufezudifajexadodo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=flipping+houses+101+pdf
    • 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_off0000c811.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC811 16792 bytes
font_01_sfnt_off0000e023.bin
41d7acd39789707b728aa423038a12fe790e4adb79b988d9ee6d446b640f5da3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 16736 bytes
font_02_sfnt_off00010b46.bin
daac85145f24e458333223e9aa79528a1470256ea1aa549a24fc687a3d16b109
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B46 10668 bytes