Malicious PDF — malware analysis report

Static analysis result for SHA-256 79941abad0f92b39…

MALICIOUS

PDF

74.3 KB Created: 2021-03-16 03:20:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 46048fa9de59e6491b72b61af3a9c8c1 SHA-1: e7c20fbc5bcd6a31d5faede0d5cf3883a6520b4a SHA-256: 79941abad0f92b3907106bd78580426fb53df7a32003c3f362ca1df0f48ae2a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary malicious URL identified is 'https://seumenha.ru/strik?utm_term=no+place+to+hide+movie+netflix', which is likely part of a phishing or SEO spam campaign. While no scripts were directly extracted, the PDF structure and the high ML classifier score suggest malicious intent, possibly involving embedded JavaScript or other exploits to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=no+place+to+hide+movie+netflix PDF link annotation
    • https://gosidobesek.weebly.com/uploads/1/3/4/0/134017516/410cd5f53b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5fca8f5f5c72e.pdfIn PDF document text
    • https://ponebivilu.weebly.com/uploads/1/3/4/5/134505494/futoxepilovonub-regije-wawegogofa-tigalininusiker.pdfIn PDF document text
    • https://giromotazipajid.weebly.com/uploads/1/3/1/3/131384567/tafawudokakil.pdfIn PDF document text
    • https://rorefogalo.weebly.com/uploads/1/3/0/7/130776605/xuwiwex.pdfIn PDF document text
    • http://tameenegypt.com/cheesecake_dexter_gordon_sheet_musictxf5r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503692/normal_5ffcfea9117d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_6009b2956ffe2.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/called_me_higher.pdfIn PDF document text
    • http://mon-cmb.best/85043258943v2hj4.pdfIn PDF document text
    • https://jopazidavasuzu.weebly.com/uploads/1/3/2/6/132681438/wolutebonapu.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/89338131494.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/civil_society_in_the_philippines.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/desixerigoz.pdfIn PDF document text
    • http://marketitaly.pro/on_course_3rd_edition_skip_downing_downloadcn7nt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_602f8082babff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mukutud/bosch_colt_router_collet.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/electronic_signature_legal.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/nasowuvuk.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/31148172269.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/im_yours_ukulele_tabs.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/google_chrome_new_version_2019_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/how_to_dispose_of_canon_printer_cartridges.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/31837327121.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/dengue_test_report_result.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 5220 bytes
SHA-256: 3ae99d0489f75dd170044076659cbe89c0d5be3be68b9a9d550026518e51f31b
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 10684 bytes
SHA-256: 73e97d3b80752b317937bc0366cd12e7dc26fe98c2f1f6bc7846677fc7a0edc1

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