Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcf37b814175d37…

MALICIOUS

PDF

81.1 KB Created: 2021-02-09 00:18:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 519398563e80d618b5ff58989dc4e951 SHA-1: 8155c80886cf265df66bf50b2bd037745135965e SHA-256: edcf37b814175d37513447c946466fe8d1c7533e2045e086edf577e6f4f0841f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to host many PDF files. The document body, though heavily obfuscated, contains a lure related to 'dreams nepali full movie free' and the file is detected by ClamAV as a phishing trojan. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/aws?utm_term=dreams+nepali+full+movie+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365525/normal_5ff971c8e9934.pdfIn PDF document text
    • http://mushygushysayings.com/20572264119926dm.pdfIn PDF document text
    • http://mexicotop.xyz/76368070007zlbh5.pdfIn PDF document text
    • https://nefarixuk.weebly.com/uploads/1/3/1/4/131407944/28c54500c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375070/normal_60099ac622933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_60140436693f5.pdfIn PDF document text
    • http://gratoram.site/138644427805vxji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5fc609485b081.pdfIn PDF document text
    • http://kvrovk.xyz/47208488162tzq5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://bajewilogofiro.epizy.com/brutal_legend_game_informer_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/wurikasebunepekureto.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/bootstrap_3_themes_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/70617623193.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/irish_guide_dogs_cork_jobs.pdfIn PDF document text
    • http://befadiw.rf.gd/ujt_relaxation_oscillator_viva_questions_with_answers.pdfIn PDF document text
    • http://tebokemirutexus.rf.gd/biophysics_topics.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCC 3016 bytes
SHA-256: 6ba0570f3e12adbbc15d3706dec1b9526cbe6327d8a4be29f55098b9bef8231d
font_01_sfnt_off0000e692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE692 5108 bytes
SHA-256: 9d736cb5016b091a9eab8399612605a1bf4302c357e11c939988962a0a90f434
font_02_sfnt_off0000f7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E6 10984 bytes
SHA-256: 0961ca048d6268377f21d04448438e9522ed8cc1451e21364911b76f07816558
font_03_sfnt_off00011da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA1 7172 bytes
SHA-256: e286a1bcd83ee6ab07915ef4cacc53728b62d89b040c7058aff69d2ff50d73d1

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