Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d331a33a7cac0e2…

MALICIOUS

PDF

87.5 KB Created: 2021-09-16 21:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f21acf9e24bc12442e4c5db7b88f8c59 SHA-1: 5d15cc6b3969aca9a480ebb83f398c1874ff7eb0 SHA-256: 6d331a33a7cac0e2d8c6655ce6857af0b5955fce76a30006f188685756a33f04
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=star+wars+app+apk PDF link annotation
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woduzavojiwabivelomazes.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/14333205225.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/pifosoridalexisefugafe.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/68955361899.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/fajixam.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/23115907880.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcad47273b---93504055810.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/26812600363.pdfIn PDF document text
    • http://gazomotor.com/allinone/file/gumupajofosez.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/zosapukanewapalapomato.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/gojaxikotujotufana.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/tudixanamadavo.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/85482335606.pdfIn PDF document text
    • https://eurotig.ro/file/latijowiwigafav.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614034c61a1fb---85012200972.pdfIn PDF document text
    • http://i-dron.cz/data/file/26235538617.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/11422771071.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/jasaso.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/rizoluke.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/nesavolikaxisom.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/vugebejafe.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/11299446458.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/8844664956.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_off0000f3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFB 17992 bytes
SHA-256: 69be4df0b7e571268e54864a52b2b39245bc3d007c9f2582bd436c6b4b0cec6c
font_02_sfnt_off00013a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6C 10004 bytes
SHA-256: cb30f809a5f4b1df4b41ace034a0b28cf9a38277b1117457a33211e4adc84427

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