Malicious PDF — malware analysis report

Static analysis result for SHA-256 092d37e26505faae…

MALICIOUS

PDF

79.0 KB Created: 2021-09-22 14:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5155166fee5d6fceae0ba4872f21369c SHA-1: eb8ed14fa3bc79b9c40b49b6257ca8359a5e6400 SHA-256: 092d37e26505faaee67611b212f21eec267787685ca31a7380b03a971224dbe0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/bogoxukux.pdf In PDF document text
    • https://kermanrooz.com/img/files/lusujimukoxenajevun.pdfIn PDF document text
    • https://wita.lt/images/files/14926065170.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/43984859421.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/zidab.pdfIn PDF document text
    • https://austarpharma.com/upload/files/ligunoxezoxef.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376f023e423---tenulizufimupumiretasumu.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/bf185462a57a70728d2810b69b85479f/jaxefakuwe.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210906/file/xirexosakanovomutizuwaf.pdfIn PDF document text
    • https://aayams.com/userfiles/file/xovuvodibimuzexupo.pdfIn PDF document text
    • http://ave-france.com/pics/files/zuxipusaneduwikezuwe.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/16694012503.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/71208001770.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/22582849112.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/8662636982.pdfIn PDF document text
    • https://tipresentoio.it/images/file/busugetalo.pdfIn PDF document text
    • http://spharma.ua/files/file/18644408390.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/nrrs1opav01q3fdogh996m1r69/77503571925.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/janenotop.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/26447288512.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/mivaro.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/vafujisigepeminoj.pdfIn PDF document text
    • https://htijsr.com/userfiles/file/zodumubevobijubuxavavi.pdfIn PDF document text
    • https://korankertas.com/contents/files/jafoniwixopaza.pdfIn PDF document text
    • https://pindimana.in/uploads/file/28588850558.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/zonufopol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=aadhar+card+correction+formPDF 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_off0000d1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C1 17316 bytes
SHA-256: a6dce8bdb971f46c7f89a72790d865a6745b8a102fa12394e969cf3421829d08
font_01_sfnt_off0000fe39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE39 10508 bytes
SHA-256: c3548800ccfdd21b34189a5d9e27c219361537be53ea8c4ad8afb6175c15294e
font_02_sfnt_off000115f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1