Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba03daed060bf76…

MALICIOUS

PDF

85.4 KB Created: 2021-08-28 13:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3fc31087e3fb64ef643ca4c32fb13903 SHA-1: 941b28aa15c96db960c7a8864fb761ecc1eda24e SHA-256: 1ba03daed060bf76ac390fe5033ee00c8b68f609ce20b22e7aa20b1205b46af4
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the PDF structure and embedded URLs indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607792f33d00f---71656047769.pdf
    • https://maggies-handmade.com/UserFiles/files/69981284657.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/s3qu68eb0utq5p82fvmh77l0fo/jiwosemevidedobapativade.pdf
    • https://bepcongnghiepphuchung.vn/userfiles/file/marowowixudiso.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/2a99c41b2b5c0eae17e4e23fbb692977/rumolukanis.pdf
    • https://lamaisonducoeur.ca/upload/editor/file/13520047661.pdf
    • http://jdhs77.com/clients/58520/File/rizasodibozumotigiwupe.pdf
    • http://giteduguedesboires.fr/userfiles/file/zoduxakokux.pdf
    • http://eventologia.com/userfiles/files/maket.pdf
    • http://tavaszitura.eu/userfiles/files/39005141695.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b7b11f787---kigozuvasewepuxewidagumi.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/7d2e4660a79d274824c8afefc43d6adc/temebof.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d042c151d41a325c788b23825316ce6a/gakasidofikug.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1b75d521f---6561269289.pdf
    • http://sgrappresentanze.eu/userfiles/files/2135221748.pdf
    • http://short-story.ru/upload/file/tenabazabeliloxajisomo.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38cb45c864---xomuforap.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/b8d0128c85ef20d858e25da840f5cacd/3269893029.pdf
    • http://www.truca-taoules.com//ckfinder/userfiles/files/xinedamafu.pdf
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/97358136808.pdf
    • http://murito.fr/ckfinder/userfiles/files/rovigawogawemuso.pdf
    • http://megat.pl/uploaded/fck_files/file/35186892478.pdf
    • https://vildmarksjagt.dk/userfiles/file/vobufezuwetekiwabapekedi.pdf
    • https://tjpapigroup3.com/contents//files/64238339859.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80ed100120---kizakozuwum.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+prepare+for+logical+reasoning+by+arun+sharma+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_off0000e3ec.bin
182aaa9ab17e0cb30bc003b103666cba37b377a9e403682fade5a35df8b45603
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 17780 bytes
font_01_sfnt_off00011232.bin
a54db811a01c690e114684840727c5519dcaad33c44579bfaee9626d2b61f6e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11232 11496 bytes
font_02_sfnt_off00012cd2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD2 16792 bytes