Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1d81436fd76147…

MALICIOUS

PDF

79.0 KB Created: 2021-02-23 15:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d6617fc8969937aaef33c03038b54be7 SHA-1: ddc0bce98f663843d331750b41c87d4669bc9eeb SHA-256: 6c1d81436fd7614793993ed84ce1f56c008c8437ab5c5ed013c8657138fcdd65
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'baarspo.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'rules of d&d' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/123?utm_term=what+are+the+rules+of+d%2526d PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489724/normal_60298dd8c5c1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375088/normal_5fcd546192dcf.pdfIn PDF document text
    • http://timelessdecorum.com/24668517150bx4mv.pdfIn PDF document text
    • http://ujjjrrrrr.space/animated_explainer_video_templatesf7gh8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_5fcdabf43eb65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5ff75ff1d499b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_6010e63737b6a.pdfIn PDF document text
    • http://reform-st.ru/fonomafogadutosupejugucst9j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421215/normal_602631174bda3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_601e21310c36e.pdfIn PDF document text
    • http://cpatrump.com/batting_skills_in_cricketttfhr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5fc909c79bd3f.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/693013439926rv5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388815/normal_6008a0bfbbc47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixoxogan.rf.gd/78944620909.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_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 5008 bytes
SHA-256: 420781da775610c7906335b6f384a1f5ee514dd42bb2446083d56c73c6cb88cf
font_01_sfnt_off000109c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C4 10424 bytes
SHA-256: df56c56943b26bdde77942defbfd9de6f5642bf3511c4e66175a093d2adda799