Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0234d7a29e5963…

MALICIOUS

PDF

89.4 KB Created: 2021-07-28 05:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: be7e0be38a4ec25ce533b09385f6521a SHA-1: 40a01dd1a63b698f1cb8218cafba326a76636138 SHA-256: aa0234d7a29e596367ea9dcf5bc5fa0de213e3daa73d2ae3596774be2b8022ce
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It functions as a link farm, directing users to various external URLs, some of which are hosted on compromised WordPress sites. The presence of multiple external links and the detection of a trojan suggest the document is designed to lure users to malicious sites, likely for further exploitation or credential harvesting.

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 https://samngaimarble.com/html_upload/file/vaxozeranamowezusamof.pdf In PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087b0082a01e---73007988227.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/33081023958.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/fijozorogu.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/739684dddb3613b0ec85130ce0e5d208/disosixulunovevusima.pdfIn PDF document text
    • http://mrmax.ca/clients/9797/File/9083310946.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/wiremusubugawadumovi.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/gajomeminovazerasoz.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/rikorovikekogibinopixos.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/017eacaef512390ef709024b2c0d738a/siduvolik.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/gajutuketave.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/tegebakofojur.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/sifisetefibuzowene.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/80573275028.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/bedulapiwisumolegasari.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0176b20280---jimikemevijosiga.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2bac562b1---tofudiviwusifewuxabeturos.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082038470525---76019798638.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/dakikojawosibumebejovib.pdfIn PDF document text
    • http://adria-ex.com/90352900063.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/15393973278.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/33994627418.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/53633916441.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/busewopetobubiliti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=formule+de+la+permittivit%C3%A9+di%C3%A9lectrique+du+videPDF 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_off0000ef9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B3 10848 bytes
SHA-256: 8e4320a2571ea1c0817ba5c37a13de7c17b440fe55491dc37f9cb69b8153aab5
font_02_sfnt_off0001202e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202E 20196 bytes
SHA-256: 5db05c10f084233c8d4fed77097e6db9156c0e07a075e28aca29aca2b720bbf0

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