Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51fe9bc3959b094…

MALICIOUS

PDF

69.5 KB Created: 2020-12-25 18:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 10a8cefd8519b5e906f68d2ac3b70332 SHA-1: 80707e4b943266829800f36388b765b4f3836c57 SHA-256: b51fe9bc3959b094a15f8b67c82be3d636988099a653f559c4ae6d1e965f818d
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://gettraff.ru/strik?utm_term=transparent+phone+screen+hd+apkpure'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/strik?utm_term=transparent+phone+screen+hd+apkpure In PDF document text
    • https://cdn.sqhk.co/jesuzedavoti/VhinE00/purev.pdfIn PDF document text
    • https://cdn.sqhk.co/pixanetu/ZhfySjj/jaxam.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/vavebufevodutob/five_senses_worksheets_cut_and_paste.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/mogitoboramit.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/76200633229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71acd0fe-f1ce-46f0-a4e4-7a57590dc854/proactive_vitaclear_vitamins.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/26483260527.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/dharma_kshetram_video_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0daabd2-be8e-4d7d-a6a4-62da4545e385/john_deere_x304_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/53263406695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a163f7c-3916-4277-9772-9a4aeb890a63/jijuvozepupizedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd44bd5-33a4-484c-9fb0-4ecf88c6d617/parezidojelasima.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/mamogekupigoxok.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA0 5144 bytes
SHA-256: 17729eee5a1a829ad09494c8340847e98c0ba932eede55add4cc3361aaf2687d
font_01_sfnt_off0000d114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD114 10248 bytes
SHA-256: 73d695a2983067fa8bb6fe456e8ed6b436b12a3996596af5569f35bad5147f9f
font_02_sfnt_off0000f467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF467 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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