Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f119d7aacb26b9…

MALICIOUS

PDF

77.1 KB Created: 2020-11-23 04:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 00ea49f8d11867d8bb4b3ae8eb595723 SHA-1: 473476db8464ac0a9b0a0ed1362f9a21b1dff34f SHA-256: 68f119d7aacb26b9e908245b68db26b7e1460f238c4c86549f175804b3e9f897
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that mimics a Kaspersky antivirus trial. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to potentially malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/aws?utm_term=kaspersky+antivirus+trial+version PDF link annotation
    • https://mubafuzolifuben.weebly.com/uploads/1/3/4/6/134644730/7118679.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/pajadekanebok_joxuv_lokupiwexamo_xaxotujalebe.pdfIn PDF document text
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/kefojafamobetuna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/111d60ed-8ea9-4830-ac1a-b16fabe1b4fc/mifakizivibavokuxute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53a0648-52a5-49ad-992c-3604d1c0b7a8/wen_6550_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71885309-6805-4a2d-a0b3-8ee9ea24a02c/renisanadoketozobizok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae6d728-c022-4f10-9ce0-7c54b194a8ea/oracion_rey_salomon_dominador.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/bagizuputosazozadixobaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712cc84f-fd6e-4ce2-be1e-10ffb870cdd6/33772200881.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/wallingford_swim_club_pa.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/patovu.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/zuduvoguzesawasitujoleju.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/words_that_start_with_gnath.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f05f888-cabc-4ce2-a709-28361575d6ec/nevupawu.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/marovekoduzokiwigajes.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/first_alert_security_system_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a180502-f5fd-46ed-8e53-b7ca5e256d57/20880219788.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_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 5008 bytes
SHA-256: 60e12d14d03030ba257f101d51dc081e2c535c1fd7cc06eaddd8f0cf6b85af9b
font_01_sfnt_off00010341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10341 10936 bytes
SHA-256: ee5c957a44201a3e4e20a342031244f3fba4950d800590cc697fac0952fd62ea

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