Malicious PDF — malware analysis report

Static analysis result for SHA-256 04429b2189c78c4b…

MALICIOUS

PDF

83.5 KB Created: 2021-06-30 12:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93364a243f80d05866c88af6dab28340 SHA-1: b071b2babe29197454c575c4705a9156505742e6 SHA-256: 04429b2189c78c4b12db5e76519294fca5401e81cf031300a470462ac628b293
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites, suggesting an attempt to lure users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support the link farm and potential phishing or malware distribution strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/vaau24vgvohcobajdj95tp8290/51008086512.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52365cd0e---sasegoxowufobavuwowikim.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/giev6gvq1rburoqgndrkppoaq2/32983637293.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/vtn3ngini6oqgqg1laus2qmukp/22199139810.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c49699b209---bopedefuwufanew.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1ac14f94---bezofupadutodumizuvibuk.pdf
    • http://espacioschillout.es/images/admin/file/xemetodikuketel.pdf
    • https://balustrady-metalik.pl/files/70774132582.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/cefdd8df9a016baa10bc4511fb233062/godatedasaloxezetute.pdf
    • http://zrdb-drogbud.pl/Upload/file/35556672510.pdf
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/529cf67b912a0e28b1f80098e51ba730/ketukalerukitekujidajotat.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/arv86uuku61qdc15r7f3psbom8/18744500927.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/p6sec8rvdctcjaaku5orccgd60/20996510991.pdf
    • http://apexnepaltravel.com/userfiles/file/kijiwogavo.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/01c5481f307d8514f1086eeafab00ad0/88495665645.pdf
    • https://afayl.com/userfiles/file/dixewonafinov.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836efa455d3---5334602893.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8d5305369---56883245190.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/dcoec1nm03ck1vme6361erdif2/nuwuvalewiwexivi.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609890c26a6b2---lifosejipixorajonemi.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d66209e3bb---kafitakuxubonem.pdf
    • https://arhometutor.com/userfiles/file/98461799555.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609417b316288---nevovetewulalexoloku.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/f5dccb8d164b5991b8e3d62d9b936c53/gisuwupawiso.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=raspberry+pi+beginner%27s+guide+4th+edition+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_off0000d708.bin
95dd3eaed39639fae38e54c5e6cdae6ddb837addb12478299db1e12450dcc13b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD708 11240 bytes
font_01_sfnt_off0000f10c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 16792 bytes
font_02_sfnt_off0001091e.bin
43ebf3445f7aafe70efded6b08c1fec97ccd6c624bbe6875ff0f591000c09c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1091E 21552 bytes

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