Malicious PDF — malware analysis report

Static analysis result for SHA-256 11374a3b65cdcf56…

MALICIOUS

PDF

61.2 KB Created: 2020-11-30 00:10:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bdb08877a662ad5f3a6ff44ed313a1f5 SHA-1: 67b89a60f5c6008b1b212cd41ac2c0f520dae172 SHA-256: 11374a3b65cdcf56b1c333220ea0058d7f786d0108b7713c7f1c80495c9e5597
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?utm_term=physics+wave+interference+worksheet+answers In PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/vakasofinututuwegiva.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/kuvibusujuwezij-giwigupi-pagepavorapij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce1986f-f934-4211-b61a-4b01e9fc55b5/salamadim.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/5312152087.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/sector_area_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e154f2-5f15-4fe4-8a6f-5bad907b9fea/29259746185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f40d99-2c98-4f1e-b05c-767caf317765/33886663995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17245738-c200-4627-b035-1b9e98eae3e5/nedatijup.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/75937771947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1ba6ea-c3b0-416f-8359-55b1f779b3aa/6165377423.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/warframe_tips_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/best_sheets_for_pressure_sores.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_off0000b574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB574 5256 bytes
SHA-256: 326a7baea79be7047c48308acf5f3821b41fa99b81c45c78d1fbb474bdce84e8
font_01_sfnt_off0000c76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76F 9640 bytes
SHA-256: 15fb8b32d17baf3e62c0049b57bd7cf5ac8c3fba6a9e6bd268643dd3225a3200