Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ed69c257fc011e…

MALICIOUS

PDF

93.0 KB Created: 2021-09-18 06:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a8c7ae68f62634fc7294dbf689b4058b SHA-1: 29013901f713f447dd5f768e6dfbd59e3475b1c0 SHA-256: a9ed69c257fc011e9146ca990d08ec7f755d1a68276685f6722c5761df7bbece
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with lures, such as 'pokemon go spoofing'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://medvor.ru/uplcv?utm_term=pokemon+go+spoofing+iphone+2021 PDF link annotation
    • http://irk-yoga.ru/upload/files/61281229679.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16141191c02d7c---figila.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/61600118245.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/9300158685.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/36560941902.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/12785430422.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/govusomizuvasiruk.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/941f6f7f178acd42240c8e690847fbb1/mefemepuwowatetom.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/tinisub.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/penepi.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/52987964782.pdfIn PDF document text
    • http://demkapi.com/resimler/files/34077001133.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/dumufuxoliwi.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/35092893617.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/98834270421.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/32724313479.pdfIn PDF document text
    • http://lasermedia.cn/userfiles/file/57851843637.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/poviselewolibemamibek.pdfIn PDF document text
    • https://safarekhoob.ir/basefile/safarekhoobir/files/titadugonakavafuvusidokaj.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ed8gg140s2o9grc8qopgqm6kk4/25399171833.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/63064913722.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16131640637ce9---63648155509.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/44854221988.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16131c6a808179---78608305412.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/xixisukonamelo.pdfIn PDF document text
    • 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_off00010512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10512 18404 bytes
SHA-256: a0ad1a25eced62ddf45d9db59ad3ffb484a9c00176982fe28d53c1882047c6d4
font_01_sfnt_off00013528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13528 10784 bytes
SHA-256: 83554c871e8d5c7408a6113d6a5dd620e9c405ee26b5f449b29135b438188267
font_02_sfnt_off00014dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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