Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b04dc5aa960e5a3…

MALICIOUS

PDF

66.2 KB Created: 2021-02-21 05:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 084ff4bda3808e71db11093891fec10b SHA-1: 7d4923e084c2b9b0d96f13897ffe8bab2a96788e SHA-256: 4b04dc5aa960e5a30c78fbd910fb7792189c3f07fa90f101093d338aea7ae219
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 'PDF_SEO_LINK_FARM' pointing to multiple suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically flagging it as a phishing or trojan PDF. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

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://baarspo.ru/aws?utm_term=how+to+open+dell+e207wfp+monitor PDF link annotation
    • http://kraftmann.su/android_oyun_clup_dream_league_20167srvt.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/903090214832f70w.pdfIn PDF document text
    • http://dinejokudino.22web.org/dear_man_dbt_worksheet.pdfIn PDF document text
    • http://gakesatigefa.22web.org/31645298080.pdfIn PDF document text
    • https://gijejutet.weebly.com/uploads/1/3/5/9/135974865/vufaza.pdfIn PDF document text
    • http://wirelosine.22web.org/aarakshan_movie_mp4.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/belapawerezuju/fotusitamagilojok.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/porizesapofavef.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/budget_calculator_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/25603596834.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/wosif.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/60668477679.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/dreidel_template_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/real_money_gambling_apps_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/fifavodovuponemutejigejif.pdfIn PDF document text
    • http://lufusemeg.epizy.com/graduation_hat_template_card.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_off0000c70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70C 5208 bytes
SHA-256: f12b3f4543a6b195c968a8fb0638ed6aabac68e93c6c3cf0cbe30c976f576c58
font_01_sfnt_off0000d8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CF 10112 bytes
SHA-256: 6720778308daafa966353647f0af414c6c37285019d43109ff1f3c2e08f54fd2

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