Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5aec8fb94eb54e4…

MALICIOUS

PDF

71.4 KB Created: 2020-11-14 07:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7b8deaec7ccdf54e4978d5775e6da3b1 SHA-1: 2138b6ec05cee50536c9d4b0d1df97c95b0c3447 SHA-256: c5aec8fb94eb54e4c2591aca3488aac25d849beeb78ca51ddd3e34ca914742cc
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of embedded URLs, suggesting a link farm or phishing attempt. While no scripts were extracted, the presence of numerous external links and the ClamAV detection indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=divvy+homes+ratings In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f88d1e6bfc60.pdfIn PDF document text
    • https://zirenujunez.weebly.com/uploads/1/3/4/4/134431605/1fcd2d490e05.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/d8afce88862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5f911b8c07131.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/6f2a1962-3638-4ab1-9ce8-667813353212/76056021752.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/sutowuzuritige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deffe857-b651-4b4a-b9eb-937a954d7125/4887455246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a489f239-122d-4495-8984-cb995180ec9c/plo_monarrez_biografia_de_shakira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee8bed3-36fe-49bb-a532-351602f1af6d/77209920781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15e204d-ede3-46b1-a6b4-f28a5e9ecc4c/status_popcorntime_io.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff3d3a2-2b58-4b45-9a85-3c39e6554eba/tugaxirobegul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51204fc2-a9f1-49f4-961a-e1a42e5d0241/47006332107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0f4d45-dce3-458b-beb2-819b6bae43bc/63253746021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1bba37-7c39-4d8d-a894-b011b208d241/dogobe.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/muzas.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_off0000d952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD952 5228 bytes
SHA-256: bdec5fd74ad9f85c7e959e49d75bb0c275e79874bcbd41afa8d7ae5d0e275293
font_01_sfnt_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 11200 bytes
SHA-256: d90b3fc57c5d1ef68859df1b7800c660a2222a73680c4f9661ea3eece054680a

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