Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa134eebb5a8689f…

MALICIOUS

PDF

63.2 KB Created: 2020-12-05 12:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b1786db5039114120a8bce23e4865cde SHA-1: bc59e8ec53a914fcf4465200f30bb6555042805f SHA-256: fa134eebb5a8689f4ba6986d0be96e1ce0c2810c0e2c515fb104e70c1af509a0
154 Risk Score

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 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 0.9996

Heuristics 4

  • 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.
  • 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://traffmen.ru/strik?utm_term=gas+laws+unit+review+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419452/normal_5fa659e068fcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5fa8601be93fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5fbe8c4587083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_5f927ba03f17e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455673/normal_5fba8c46e4fa6.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/5fc0e85027a199023ab5619d/t/5fc5c081e6d49a06bb5a86f0/1606795394465/lalam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15a4327a199023ab881d8/t/5fc484af61e25426e1c8a0a6/1606714544241/nawaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb5c3ce-be39-4271-8043-7d8ae5837ac9/29870767171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe382f8b-9335-4b72-ad9f-4bc03c2e6dd5/pomul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cd69d0-56bc-46f4-8737-f278d4c5c5d3/pexado.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_off0000bc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5B 5020 bytes
SHA-256: c01a47b01cd10af46c6ee2711bfa2470f4884cbfd71124a2f87f171ad9ccc658
font_01_sfnt_off0000cd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7E 10196 bytes
SHA-256: 0b2148ff3e7444560af10b57c3e426cf65244315cfa79309717e1dffc29646f8