Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3f05393923c0a3…

MALICIOUS

PDF

84.8 KB Created: 2021-09-15 09:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5e62b83467f69bfb07db6c83f0983d88 SHA-1: 44abf0e8b9dc5c22a22be3668beeba1bdc3ab4ae SHA-256: 9f3f05393923c0a3e041d1860ec5af1517387bf9dd3d8d665345a0aa74f00329
196 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a specific rule for brand-impersonation credential phishing targeting Netflix. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=friends+reunion+watch+online+free+streaming', are designed to lure users into clicking and potentially submitting sensitive information. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://pixomot.ru/uplcv?utm_term=friends+reunion+watch+online+free+streaming.
  • 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://pixomot.ru/uplcv?utm_term=friends+reunion+watch+online+free+streaming PDF link annotation
    • http://a-daily.jp/app/webroot/contents_img/files/35261580059.pdfIn PDF document text
    • http://cantinachitarra.it/userfiles/file/peruvudoxozurijezovane.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/27vh3m98715megdc725o02ogt3/32339804450.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/14673197424.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/fewolu.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/18211913617.pdfIn PDF document text
    • http://qcfloor.com/userfiles/file/63199069280.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/49528396313.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/tuzep.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/zekefipisamotidefi.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/48573474980.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/26594300602.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/2gc6i1m81q6tluokmqa6haa8c2/21640152594.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/rexigugefixugixom.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/33266116259.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1614177200b6e2---lomadudibaduf.pdfIn PDF document text
    • https://angem.fr/userfiles/file/20267215178.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e60554dcd3---dadez.pdfIn PDF document text
    • https://digireg.nu/upload/dosozipibe.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/59163620691.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/14953377637.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_off0000e132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE132 11088 bytes
SHA-256: 75411de9735b6da0bd846a71d6b19b5d84f7bb8e66de2a656102576839409fe0
font_01_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 18828 bytes
SHA-256: 8ef63969e20f9046b2a0cbb22dd777d0db427324d30bcc8680d775ede668149e
font_02_sfnt_off00012c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1