Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef41d43655099cc…

MALICIOUS

PDF

70.4 KB Created: 2020-12-21 19:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 11bb0b6095a662568f8dc9def7c9fd51 SHA-1: ed51659affd90dcc40d2a39bfc98442ece714a3c SHA-256: 2ef41d43655099cc35681736abf597db6d35167d01000fe59d431609b5dfb1c7
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=contrato+colectivo+petrolero+vigente In PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/wokitasodepiwog.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/5fc5672c7848ba205d36dd8d/t/5fc9ba35e4017829c168f453/1607055926159/modern_warfare_3_xbox_one_x.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a252f9866f3fd2f4236e/t/5fc6773d5147b1480412112b/1606842174511/tape_it_up_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7673002-b27f-449e-bb8b-8998eb9be9e1/acca_f7_lecture_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7c82ba-b94d-4b14-b94c-2b1620a46900/persona_4_adachi_english_voice_actor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ca1c85-8db4-4fb6-b8ee-f4c0c5798f92/war_thunder_tank_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b147e5f-d59a-42d2-b2f2-e6d95e752f52/numbers_in_sign_language_1-50.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/82842891470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e681e7c-fd7a-4332-a957-10fb8d946371/30637178208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e3ec1f-cc89-48fe-8762-46a993194496/72537380846.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51f2860f2895dc10325ef/t/5fc70c27ad3e6411923ce544/1606880296292/vatatoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d850ba-a67c-4299-851e-73dcdcde1c5d/42013751764.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_off0000d6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FA 4888 bytes
SHA-256: fc47bc67da4fa89e26eed6b44a2d4a9d210a2c171d39ea536132a561d878c53b
font_01_sfnt_off0000e7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B4 10756 bytes
SHA-256: 7eb2fd5a3d1bf6c087033f0111d7dfa859fb82a361bfcc396a272b9b70ce0a46

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