Malicious PDF — malware analysis report

Static analysis result for SHA-256 997ed150274d8c3c…

MALICIOUS

PDF

61.8 KB Created: 2020-12-17 03:48:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3b34268a353f0d6612388e1c5789f2d6 SHA-1: b8d948ca4b3697c79d733ade5675de8200d675d8 SHA-256: 997ed150274d8c3ce3bf59049875af3849b36bf6c79aa7bfc140aecfdefe5f7a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that redirects to known malicious infrastructure, likely serving as a phishing lure. The document body, though partially corrupted, suggests a pretext of providing answers to a specific search query to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=realidades+1+capitulo+1b+answers+page+30 In PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/zovojan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451551/normal_5fbe118b7191a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f8a5af7b6893.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc56f2f7848ba205d3738c7/t/5fcd66d774a40730fbac02b1/1607296731727/paranunivopuwoxoxi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2aa6b5687f52b6b8c813a/t/5fc7e0942431962c2dc6bccf/1606934678987/real_steel_world_robot_boxing_ps3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf52deaf37e3b64613ccc/1606284589558/everstar_portable_air_conditioner_mpm2-10cr-bb6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33c09aec-a353-45d0-80f2-45640e8ae272/begijusopewegekubopewem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd04e32c6de34c7a39ed1c/1606223076024/sfsu_summer_2019_grades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea369ff-e629-4a8a-9b3d-0b86c0e1479a/wacker_bs50_2_parts_breakdown.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54c685bcb0228a29f9b3d/t/5fca3d4a822fbd3263e9899d/1607089483398/translate_english_to_chinese_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7728ef-62dc-4960-8c9e-f58320fee92b/kimumabuvibonefed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bb4117-0927-4e34-a5c4-4fb0eb57383e/3546648713.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce027f1d9e1221b0389647/t/5fd20166871f8c6e596155f5/1607598439105/kievan_rus_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2e3d88-d0ba-4251-a09b-c763535521a4/ejercicios_matematicas_5_primaria_an.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf3faedabee7b44068fcc/1606218753304/scp_medical_department_roblox.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_off0000b15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB15F 5836 bytes
SHA-256: 36b1195fa9313954e00ea4bf0c213ec510d9ee64b1642e8b94cabe8b9bc87652
font_01_sfnt_off0000c564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC564 10936 bytes
SHA-256: fe681bbe14ab6ae958862cf8fc97ac2a869abf1f80534e83fb4475f4c26cd021

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