Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95e0e51ba638669…

MALICIOUS

PDF

78.8 KB Created: 2021-01-11 10:32:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 716ff8e905da10126df36ea2cf5d8500 SHA-1: 8ea878bf8a2ce5028778ad19113c975cee539c99 SHA-256: b95e0e51ba638669a53be39cea64bb09ef5ffc006f2af3c2fc76b0953582b0d5
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV also flagged this file as malicious. The primary attack vector appears to be directing users to malicious infrastructure, likely for a phishing or malware download campaign.

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://gettraff.ru/aws?utm_term=sybil+2007+movie In PDF document text
    • https://cdn.sqhk.co/renapudovi/UgjgdX4/usa_facts_covid.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/gggUfhd/vanijijubogagodofe.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/Yih6HHm/33109109731.pdfIn PDF document text
    • https://cdn.sqhk.co/vobilurerire/jeibhhC/26417888483.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/bIIgjhc/pounds_to_ounces_conversion_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377112/normal_5fc44127672fc.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/ePhd09c/34339304883.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/g3icnie/online_photo_editor_like_photoshop_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/denobafopum/giijial/perodidosaxisezavidodo.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/badodemebo/mage_fast_leveling_guide_ragnarok_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/medical_medium_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/a_couple_more_years_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/wolf_among_us_apk_and_obb.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_off0000f8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 5108 bytes
SHA-256: fa814d37cf0078702bb6719c7285e599a2751587b4bf0ea04cde6c1e047116ff
font_01_sfnt_off00010a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3B 10608 bytes
SHA-256: b573a64e016aae9f01e8d1bd07c228ef641680107398422964bce4436b9c376a

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