Malicious PDF — malware analysis report

Static analysis result for SHA-256 54722f0a410dc592…

MALICIOUS

PDF

38.3 KB Created: 2020-05-24 10:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24d5720b57cb3f30c5c3e5123810b581 SHA-1: 93236c20948c1771ce76c10609ff8d5a7ead5eff SHA-256: 54722f0a410dc592a7995d2e3ad9c5666df8c34142c6ffe0d646903d9425423e
96 Risk Score

Malware Insights

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

The PDF document contains a deceptive title 'Aftershock: earthquake in new york' and embeds a large number of external links. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, likely intended to direct users to malicious sites. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • 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 http://dcfchurchftbend.org/uploads/1/3/0/5/130539345/130539345.html#aftershock%253A+earthquake+in+new+york
    • http://friendsofkisimani.org/uploads/1/3/0/7/130740183/86b39c5c1e.pdf
    • http://motorpetroleum.com/uploads/1/3/1/4/131438788/d3a5c1455e1a.pdf
    • http://pr-werbepraesente.com/uploads/1/3/0/5/130551823/1d591.pdf
    • http://mademix.net/uploads/1/3/0/5/130551651/9727476.pdf
    • http://1stmscouting.com/uploads/1/3/0/6/130639183/gexeleram.pdf
    • http://kellybunn.com/uploads/1/3/0/5/130589171/fogipo-gilizigupujax-dobinuwinu-kezegosijokemu.pdf
    • http://namecessity.com/uploads/1/3/1/0/131070695/ladol.pdf
    • http://elegantcoatingsdesign.com/uploads/1/3/0/7/130739158/e7297a697748a.pdf
    • http://amarismedical.net/uploads/1/3/0/5/130589036/4344094.pdf
    • http://merseymanchesterterriers.com/uploads/1/3/0/2/130289346/mitak.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_off00006ae3.bin
f206befa352cbd093d143004d4edb3803d2d17a282b3649f3518f76a86a9b1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE3 10664 bytes

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