Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a6588ad2a18608…

MALICIOUS

PDF

86.4 KB Created: 2020-12-23 03:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8febe7a21dea1dd521299d935ad3d17f SHA-1: a51c7d60b9fb9b938c05aec8a26f69014551a45d SHA-256: 83a6588ad2a1860875600e1cfa72972d7896b62d72ca38cd6e3f86e4818f2c6f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://gettraff.ru/strik?utm_term=download+game+minecraft+2020+gratis+android`. This URL is presented as a download link for a game, suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=download+game+minecraft+2020+gratis+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f9b263f5573f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5fc02600c8a74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5fad5b797af8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_5fabb2ebb2ae8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e39a81f-fae5-4653-9378-9dd29cad1724/metropcs_authorized_dealer_orlando_fl.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/call_of_cthulhu_rpg_rules.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe28b21c78aa226e26ed307/t/5fe2906e9c058771ce095d86/1608683633578/email_template_asking_for_performance_feedback.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/delicious_cake_hd_images.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/urban_fiction_books_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/901e370e-809d-4644-90ed-4c15c0c89d69/gutobotawibidetab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32225646-3c40-43c1-b28e-0d7135f76b8a/74300914154.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86C 3568 bytes
SHA-256: 0863108483a17cc135258b69dc93e1cdddd09b978a98c41f079452ba0981b79e
font_01_sfnt_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 5708 bytes
SHA-256: f3fd5375ec0c8c88276a4cf2d3740226b2cb9633373ce247ee01f27761a6b30c
font_02_sfnt_off0000f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 6116 bytes
SHA-256: 860f2aea08750fa354ea05d9a747f7b3bb8eded63b10501bdc215bb13d990edd
font_03_sfnt_off0001087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 12188 bytes
SHA-256: 28b3c97c61138f38fb7d8888e22d5652347ecd02bf626a079f2116a7a9a67548
font_04_sfnt_off00012fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE2 18200 bytes
SHA-256: 5217bd29a71dd35faad0517b7ec7f1c71f833f9667a99949fef47c31555e293c

Open this report in the interactive analyzer, or submit your own file for analysis.