Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a136e2a3507d5ce…

MALICIOUS

PDF

67.7 KB Created: 2020-11-10 03:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a31e3322cf530bde97cf82105cb7bbb4 SHA-1: 4c2e58d0ddb13e3ef403d507b76183e43cf1e8ed SHA-256: 5a136e2a3507d5ce8774fda296d0bb7d0ab504850b46d08df863eb498b4e8f11
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be related to game cheats, suggesting a phishing or scam lure. The presence of a malicious redirector link and the ML classifier's high confidence score indicate a high likelihood of malicious intent.

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://cctraff.ru/123?keyword=cheats+for+dragon+ball+z+dokkan+battle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_5f94f2436e993.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/0b6765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f913b48e301c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fa9c783a6388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401989/normal_5f9390876c307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8df3b4deb8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474211/normal_5fa9d03d07180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_5fa875d6b9668.pdfIn PDF document text
    • https://rusepokobedog.weebly.com/uploads/1/3/4/3/134366979/xesej-detukegevu-dodoxunezapon-gimedajadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f97dd50efe87.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/cc16bff5-4126-4075-91b1-b0004bf80098/nalojebozirosop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2441d9fa-cd9f-430d-b4c6-a087fb92678c/2804_opryland_drive_nashville.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36905b9d-3b09-4e74-941a-ce8274d46262/39947263377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44b0f2e-5aba-4803-a0f1-12b3da8d37ec/mono_red_tron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b016ccfd-b9c0-42ae-9fe8-55c048a5c300/wodimizapukijitikar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a525652a-f816-42ca-97f5-74be8b63fd53/27332336242.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_off0000cb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB46 5328 bytes
SHA-256: 7526793e66f9e1b453b315cd2c96883d927db4261c7b8392642895d5a62c02de
font_01_sfnt_off0000dd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD60 10932 bytes
SHA-256: 5de5ddefa20e2fc2280448d0c2d869b52e920ab092f7ed74eb31ced2e5ba5cb1

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