Malicious PDF — malware analysis report

Static analysis result for SHA-256 24631ef9bb48e14e…

MALICIOUS

PDF

47.9 KB Created: 2020-07-08 12:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f67fb0b8b090d8293e74464a0d9f68f4 SHA-1: 8114b5cb69bf244b93b2c48e7d5477b76aa425a6 SHA-256: 24631ef9bb48e14e772a06be633d5757af655f2f146ed7c157141b07433c2727
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a car manual, suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ttraff.com/wb?keyword=2000%20chrysler%20neon%20lx%20manual
    • http://files.bcreativeideas.com/uploads/1/3/2/6/132681494/siwiwusap-vosoju-dogevevepopo-xojopir.pdf
    • http://files.ikargb.co.uk/uploads/1/3/1/4/131409170/c416f2d8c877.pdf
    • http://files.hillcrest2018.com/uploads/1/3/1/0/131070523/4145378.pdf
    • http://files.nicolereddingtonart.com/uploads/1/3/1/4/131438819/suwumazaponoza.pdf
    • http://files.carsontidwell.com/uploads/1/3/1/4/131438249/mumiv.pdf
    • http://files.northeastchristiancollege.com/uploads/1/3/2/8/132815752/aa6f3662cf3b5e.pdf
    • https://sujaxogudat.files.wordpress.com/2020/06/93378498802.pdf
    • https://vuveleva.files.wordpress.com/2020/07/pikeniwafefotax.pdf
    • https://kawumafovod.files.wordpress.com/2020/06/4864075909.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000702f.bin
62db860bed12859a38c29a759cb54c2d92832b6be380afb1ce6587ee1a57ecee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702F 5140 bytes
font_01_sfnt_off0000816a.bin
69e79ca7ae950180db0a2a1c54911148b0b20a0d31945a48ce8689f5e3080351		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816A 16300 bytes

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