Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c34bef0a720c9c…

MALICIOUS

PDF

34.6 KB Created: 2020-04-07 20:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0105dc01f80f116f601cd791a3aed9c3 SHA-1: 7af5e1bb3d9e16d03ea11df5d4d8afb6e196ce7c SHA-256: b4c34bef0a720c9c4cafed7d5f5380213e1e6c4c10b15ba7d582c90d086bede6
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files and HTML pages hosted on different domains, suggesting a link farm or distribution mechanism. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to external resources, which could host further malicious payloads or be part of a larger SEO poisoning or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://mcgovernmeats.com/uploads/1/3/1/3/131379524/131379524.html#super+spontan+all+star+minggu+1+full
    • http://beckypittmanknows.com/uploads/1/3/0/2/130287972/573318.pdf
    • http://bookingelopeinindy.com/uploads/1/3/1/3/131383407/9129861.pdf
    • http://wasboring.com/uploads/1/3/0/7/130775998/gawefafome-xakex-ruxabenuzilisa.pdf
    • http://lotalooks.com/uploads/1/3/1/3/131398430/gijapikexuwigel-badovewipofuxal.pdf
    • http://christinacooke.photography/uploads/1/3/0/6/130622053/484884b49876.pdf
    • http://be-stronglikebull.com/uploads/1/3/0/4/130477755/jagaginuxevetenufexo.pdf
    • http://anthonybeastmode.com/uploads/1/3/1/1/131163996/c7b41af4214d18c.pdf
    • http://dewhy.com/uploads/1/3/1/0/131070631/e7b3cd.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006096.bin
a050137361da867902d70dd77af5848dd1efa356eb775b72fef790821cb84aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6096 7408 bytes

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