Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba32243a1eb2fee…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 03:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fb619e77e4ac8b14cd7a1b54b07c41d2 SHA-1: 79e168c0ea382ecb2d6f8f8c8af03d05b021f5eb SHA-256: fba32243a1eb2fee8c25a910e3909ff7721f8f52be06946239a1ee1df0368f8d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to various compromised websites and disposable hosting, likely for phishing or malware distribution. The presence of numerous unknown URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/lnee7ufjrli4ceg9bgiv4t2mp4/44210247390.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/5cc164d64869b7aa394f30b383dcb1b5/fivemegedozibumivaziripik.pdf
    • http://bearings-home.com/userfiles/file/94617394671.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d620448ba8---26457545552.pdf
    • http://kimdaiphatsteel.com/Images_upload/files/ludezulegisekeru.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a45ccc9761---xejoratodofip.pdf
    • http://yi-xiang-yuan.com/CKEdit/upload/files/gowirogitulugupebewuvof.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f54c26b40---25015238319.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/58rf7j0le6et7vips89d52dmnv/vajexixi.pdf
    • http://adance0112.com/upfile/editor/file/mijagivafawoze.pdf
    • http://piau-po21inn.com/CKEdit/upload/files/medoteguri.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d2364078709---15326701073.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607eed6cec77a---mefesafotov.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/1cagn442e7tgud54ploef1ukbe/diwezoligizorix.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/fb1e43ed272879d2509cfcbb72459484/wisisebesuveror.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0eb03f66e---37728826505.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/ks26817ulugo9pi11smvkaaqh4/toriwururorekiji.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/btlf3dmq6mce5kf2lcq994rn23/redefigibinoxigixugusuze.pdf
    • http://goteneplast.se/files/images/file/zolizod.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/8d331e78ecf945e20d7fc5bfadd65c59/zomosuwiboremozetiza.pdf
    • http://exmar.it/foto_fck/file/sanumokotenoj.pdf
    • https://salvatoredivilio.it/userfiles/file/senimagijupelazakawisoxe.pdf
    • https://bamfieldrental.com/userfiles/file/buderuzamepilapuke.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+break+7+day+fast
    • 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_off0000f682.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF682 16792 bytes
font_01_sfnt_off00010e94.bin
2342c6dba12a9b0e8122157dfc776219f47b63bf4ccc45ccf9f26507edd578b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E94 16896 bytes
font_02_sfnt_off00013a6e.bin
043dbedd62c4295d74735a204f3a8084ac7904aeb6aa833093b4bc17a23b50b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6E 10580 bytes

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