Malicious PDF — malware analysis report

Static analysis result for SHA-256 5677527f19d52d56…

MALICIOUS

PDF

89.9 KB Created: 2021-06-26 13:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d56d41f34087537c2bad90df3161ca8d SHA-1: a428e3755ece98392e85016e1233710bfd692350 SHA-256: 5677527f19d52d5695577d21fc8ca2d8508546b28d9e20e36b47835f37ffc5db
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bf0e3b302---85288748260.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085441c709c9---vezesap.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29fadd1604---piruz.pdf
    • https://wfca-czech.cz/temp/userfiles/files/wimekunubupajoza.pdf
    • https://bushregenerators.biz/userfiles/files/38963249011.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/87foo8g0vsrm9vk2f8jtgo2njc/boxipogamuzufimo.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16240659215007.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bbd9905a2---vasogevowo.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/03815614c6d9c5c2677a93d33f9db648/49677407251.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c454db2d1a5---goterake.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868be8e08f9---tuperibulatafuzixibeza.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cd6ea9c99---61561545398.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f09b9a44d---xadakovolunojusopawu.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d3f92095b6fea97cd1609af77f4da423/futusunavim.pdf
    • http://ever0036.com/assets/uploads/ckedit/files/20210603002632.pdf
    • http://lawngo.net/fckfiles/89781482101.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/ckk8tnk2o760i5hk8nbrgjgnak/newegedivegufigibadepejux.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/9c3cf2f4f7f2e251e55aa2d20812e63a/20637099468.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d7fe27266---26678440714.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/eb02c59a28376f0de42c8f96d0d28e61/45355955032.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/qek6mllgs4lrsli5jft5u7sqq1/4723578325.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088a8d1a180d---merikekorexizolutumizuvev.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36154cb1cf---xojuzalidovuvo.pdf
    • http://pamat.ro/UserFiles/file/32809601570.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824c8d60e64---lomaditafanofif.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=meaning+of+the+prefix+geo
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e193.bin
d1a72e6dd3287a621a9539a34e800740359cbaa894565d5a4608e136083e2619		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 19364 bytes
font_01_sfnt_off000114b7.bin
9ebd29a1263a90352a797f9bd03013e5ac2e8eb0880f3b6a8a959e8de9f385c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114B7 10516 bytes
font_02_sfnt_off00012c94.bin
8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C94 16060 bytes
font_03_sfnt_off000141a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141A7 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.