Malicious PDF — malware analysis report

Static analysis result for SHA-256 292b3b7e90d08944…

MALICIOUS

PDF

75.1 KB Created: 2021-02-25 04:04:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0d5aeb54648740c5395319d922baf0ef SHA-1: f8c59f2848235ecc371502d5786de8f98caf9059 SHA-256: 292b3b7e90d08944fb03af65dffe1062c7b7bc17c3d8f411da9ac6f227ba7f92
214 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious redirectors or SEO link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/wix?keyword=what%2527s+eating+gilbert+grape+themes+and+quotes In PDF document text
    • https://cdn.sqhk.co/veletafi/jkiiibx/change_gif_to_video_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/jiidhir/party_city_vampire_costumes_for_womens.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/ihhckhi/80425924070.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445331/normal_5ff1ce955c79d.pdfIn PDF document text
    • https://natatujefeni.weebly.com/uploads/1/3/1/6/131607075/dinikabofavib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455907/normal_5ffd7c54dca19.pdfIn PDF document text
    • https://tuwowezofe.weebly.com/uploads/1/3/0/7/130775341/9683085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_6016117dd14a0.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/pL5ihB8/kotugofuwomodoloto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381528/normal_60020e39b0bda.pdfIn PDF document text
    • https://cdn.sqhk.co/lokuwanij/jbidjaa/download_aplikasi_sky_roller_mod_apk.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/wupixufekijax/cricut_heat_transfer_vinyl_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/what_the_term_developmentally_appropriate_practice_means_to_you.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_off0000e8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A5 5688 bytes
SHA-256: a42f437694ed2f3cd0d755d3c26fab9e4ae36d60fe05ffdc9611f8cf82ae88c5
font_01_sfnt_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 10264 bytes
SHA-256: 45090eeb2ed165c0f0da71fd2e78eea983a95eebb994f7149518e94c9ed62867

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