Malicious PDF — malware analysis report

Static analysis result for SHA-256 4750ba7fb773ac12…

MALICIOUS

PDF

69.2 KB Created: 2021-02-10 18:18:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ea6be1eada7a2e4f71c932f818efb905 SHA-1: e8cb13856aa12b1aca41b7255060bcd34eb07f06 SHA-256: 4750ba7fb773ac12e96486dc4ec6b97a83597a3992ade66d98c739b638a14647
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/'. ClamAV also detected the file as 'Pdf.Phishing.Trojan'. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=tongues%253A+beyond+the+upper+room In PDF document text
    • http://reduslimitaly-official.website/stickman_football_soccer_3d_mod_apkk2hgf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384632/normal_5fe3c1c62192a.pdfIn PDF document text
    • https://cdn.sqhk.co/wibezudak/jcjhvji/adorable_home_unlock_bedroom_and_bathroom.pdfIn PDF document text
    • http://devgm.design/finsa_mdf_technical_data_sheeto05e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fe3b15a0c858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485434/normal_5fffeb8a422ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_5fe9cbf7980ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5fcf283f92716.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/6HgeChc/bedafuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489725/normal_5fe9965f0e41f.pdfIn PDF document text
    • http://artdebug.site/xipitokolodugowadozorwjmqx.pdfIn PDF document text
    • https://cdn.sqhk.co/sururezog/ggnghi9/gravity_falls_theme_song_trumpet.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/a5hghao/telegram_messenger_app_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kekazorub/2jajfjd/pobupaj.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/rimepusox/company_letterhead_template_design_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/24861962685.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/extreme_ripped_mom_jeans_missguided.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/agonistas_glp_1.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_off0000d128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD128 5372 bytes
SHA-256: 0de7643c6c83f168b2ee22ad2b10779bb66b0af0d219f501d574b9ac9872b780
font_01_sfnt_off0000e34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34C 10692 bytes
SHA-256: 31d5bd0b80f6db7624dcb7ae3b3d7d431c3f9649c8f1ff9a38c90ffb93461367

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