Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e6e7c2953980c5…

MALICIOUS

PDF

81.8 KB Created: 2021-07-24 03:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eee9a92a5b951c11a000678e05a7fa3a SHA-1: b74f664eb32aa60bc95d7589da2609d46bf90247 SHA-256: c2e6e7c2953980c5a91d8f6ad50a1f150bc5fff963854e7616d88ea63a201e08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external URIs and a link farm structure suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pasarantogeldua.com/contents//files/feloxedozokigunijukedo.pdf In PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/tudapowawujudelunomuxos.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e8ebb7ffe---60594316782.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/kuwilaxedigorobudigixu.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/98244221924.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ede6ec6526---dedij.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/1df434bcc2af19ff3113edb0b193b2e7/90784221084.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/90517077774.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/een6jdjmo35gnm2e55ttpei0kt/98593700987.pdfIn PDF document text
    • http://mesahighclassof63.com/clients/79820/File/97266250410.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/105citjev3h3mnt1l4v4cermg6/sitobe.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/574595250134de05a160c60b87377a9b/86795214794.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/dutirenuzug.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog//file/pitejamotizenomugis.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/27739333475.pdfIn PDF document text
    • http://sns.hu/_user/file/1540755399.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bfd38d345---lomovowizujefidalido.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/zuwizote.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/radetu.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d08e700e7---xadixuxoworekatiki.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1621586567.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/mofadinepina.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/72382795434.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607624488e39a---fuvifexafuli.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec523f45002---temizinovomeronavine.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ciclo+otto+ejercicios+resueltos+pdfPDF 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_off0000da97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 10608 bytes
SHA-256: a1cafb0996e943e61e5183c4aa1ddcdf8b65abcdcae2ad4c0ec7d554a7497c13
font_01_sfnt_off0000f2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EC 17508 bytes
SHA-256: f22bca86689c3784f63c98042597dcf28d27982a1bb0999d32f6e13c551c6e33
font_02_sfnt_off00011fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1