Malicious PDF — malware analysis report

Static analysis result for SHA-256 7411025f12c2c6fb…

MALICIOUS

PDF

71.1 KB Created: 2021-01-25 01:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e7fd565a1a34c3d56a5942b9f4b37758 SHA-1: 695f37b201ac726a2c3832e7e20c2c8c9760445d SHA-256: 7411025f12c2c6fba1d460aab7a4d8cab2cfe9e3b6c001ababf1945a6292140e
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with many pointing to suspicious domains and identified as part of a link farm. The ClamAV detection and ML classifier also indicate malicious content. The document body, though heavily obfuscated, contains text related to search keywords, suggesting a lure for search engine traffic. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/wb?keyword=pew%20pew%20pew%20lyrics%20auntie%20hammy%20meaning In PDF document text
    • http://govnososal.xyz/kupegetematavokowagobljmz.pdfIn PDF document text
    • https://cdn.sqhk.co/xinovupu/Edjjjhh/midalutipogabojuvu.pdfIn PDF document text
    • http://iminn.ru/bullet_force_multiplayer0koe0.pdfIn PDF document text
    • https://balixilime.weebly.com/uploads/1/3/1/3/131398392/f2c48da7884f2c.pdfIn PDF document text
    • https://zomafada.weebly.com/uploads/1/3/4/7/134772300/080f9f7f0e8d05a.pdfIn PDF document text
    • https://cdn.sqhk.co/maweveju/azhfiiI/5788306097.pdfIn PDF document text
    • https://rofekituluz.weebly.com/uploads/1/3/2/3/132303072/9071497.pdfIn PDF document text
    • http://mxbur.fun/74023860293z5hnq.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/fhawLLE/wish_me_luck_tv_series_theme_tune.pdfIn PDF document text
    • http://rusakova.space/drifting_warszawa_prezent9e4gy.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/jepinebawo/ajeeb_dastan_hai_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/vurixuzefojufanatuve.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/financial_reporting_and_analysis_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/walter_isaacson_leonardo_da_vinci_audible.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_off0000d647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD647 5540 bytes
SHA-256: 24ff443b5f6b88490307de206a1f8f5f8ccdb4ed5053798e3a4c3ab38bd4476a
font_01_sfnt_off0000e911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE911 11368 bytes
SHA-256: 29ec95ecb0bdfb3d6f4d7396429349ac0cb7af1526fc348f4d800b851615f609

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