Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f64e94a18e3ecb…

MALICIOUS

PDF

86.3 KB Created: 2021-06-27 18:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 94b9cdc459b1e9f60dfe7cfd7b1154c9 SHA-1: b608c82e0b8661b0eb866856404b271bbc2f2503 SHA-256: 03f64e94a18e3ecb3aa376d9c278d4d4b969fdd94a7936795eb7e4dc5a3fd5aa
156 Risk Score

Malware Insights

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

This PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest a tactic of using a seemingly benign document to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://abnicum.com/files/file/40553777882.pdf In PDF document text
    • https://pet-fashion.ro/mm/file/dolirozoriwusipuzerix.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072106973f2c---74865933825.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/43246327908.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/1ade81ba0c17a3229526c52d35d33a7d/84847503285.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/melido.pdfIn PDF document text
    • https://schmitz.cz/res/file/20563222907.pdfIn PDF document text
    • https://blogsma.com/files/momojalivuvuxiwen.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc12d52071---57943297116.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/29002856751.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/98928415988.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/a341dcaed614ac44e87f856de41e28d2/zupawo.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/p1j80t56bj8uilufpefvqpol6f/berotowetuneru.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/49ad27f5b9b02564fb7cf5081e1fd518/kumemidowigo.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/45190271285.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/21187859818.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52f1834fa---madinutem.pdfIn PDF document text
    • http://mav-auto.ru/images/file/99964639979.pdfIn PDF document text
    • http://vtaky.sk/media/file/46675634722.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/44657474570.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/75276236898.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a06b92a32d---barebazekovudozafaxaforar.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0bbb61a34---81898849401.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/daluwububoxutu.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b01f1e94e---bojapidukavovivuxap.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/4c59407b40659ea74c5673358f51badb/95090592574.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9e1967b0b---80894807672.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=is+kcl+ionic+or+covalentPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 10332 bytes
SHA-256: 471c0ee37e9eb7877cf495b4b83fae3bf61d2cd532c38a1b0ba05d1b5d2f0c8f
font_01_sfnt_off00010588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10588 18028 bytes
SHA-256: efa0e4d5d4ca4fd5cccf4f410badda62621197d097ec9c4c911716ce661c45da
font_02_sfnt_off000133a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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