Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7fafcda2555a59…

MALICIOUS

PDF

77.7 KB Created: 2021-02-18 06:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 98adcd905cc7be761ee09b81aa0f2699 SHA-1: adabacc2b1a28bf39e79f983d75e124c275f08d2 SHA-256: 5c7fafcda2555a591a23e3527aceff2ffcb8ffe0484797f90c3f63f9445a6fca
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious sites for further exploitation.

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://maypoin.ru/wb?keyword=importancia%20del%20escudo%20nacional%20de%20costa%20rica PDF link annotation
    • https://cdn.sqhk.co/jotepomi/hi6igvh/football_champions_league_winners.pdfIn PDF document text
    • https://sawolopu.weebly.com/uploads/1/3/6/0/136049845/rulepazo.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/iNjjgj8/mindset_definition_merriam_webster.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/0903e3d5a8ba510.pdfIn PDF document text
    • https://xotixonivared.weebly.com/uploads/1/3/5/3/135347444/duwasisuvuruleliruso.pdfIn PDF document text
    • https://sotipazokelaxat.weebly.com/uploads/1/3/2/7/132712266/54d40eb.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/sosupejuxofedo/bms_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/anemia_falciforme_caracteristicas.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/zipuxopititikogana.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/ag_barr_annual_report_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/69692384919.pdfIn PDF document text
    • http://nudumen.rf.gd/best_adblock_browser_android.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/what_temperature_should_a_beer_cooler_be_set_at.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/wavabewamurutizisa.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/birthday_invitation_design_templates_free.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_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 5156 bytes
SHA-256: 3999003701819c67936f5f1605b497b006e2d398f62a839d223e4c925eb113f8
font_01_sfnt_off000104f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F5 11208 bytes
SHA-256: 1399ddf0eeb043eed06ea616cf7f3b80667a8daadfc3f13e2a774bd1ae08723d

Open this report in the interactive analyzer, or submit your own file for analysis.