Malicious PDF — malware analysis report

Static analysis result for SHA-256 022cc7fd5d1afa04…

MALICIOUS

PDF

35.2 KB Created: 2020-03-17 22:38:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7891858bec49f60a5d2c81b8f1fa15f6 SHA-1: 6abf78d53bd2d72ebfdafa35ea122b19e844351f SHA-256: 022cc7fd5d1afa04d7898f20a916e79aaa45b9a2102e0a0801cd4242ab53651d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted across numerous domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body also contains a primary URL that leads to an HTML page, which in turn likely hosts more links. This behavior suggests a link farm or a distribution mechanism for further malicious content, rather than a document with legitimate user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://danibanda.com/uploads/1/3/0/7/130776421/130776421.html#what+is+cubital+fossa+mnemonic
    • http://supernatural-wellness.com/uploads/1/3/0/5/130550985/1232602.pdf
    • http://millsacthelp.com/uploads/1/3/0/2/130289784/47befd32.pdf
    • http://galenetics.org/uploads/1/3/0/7/130739607/2e7a9ffb47.pdf
    • http://www.accyp.com/uploads/1/3/0/8/130874260/4625b59e95.pdf
    • http://sicati.com/uploads/1/3/0/3/130313411/5da2d19f1cd810.pdf
    • http://101redirect.com/uploads/1/3/0/2/130270752/6410229.pdf
    • http://aquabellasupply.com/uploads/1/3/0/4/130483198/1f756c0767de.pdf
    • http://summitphotographer.com/uploads/1/3/0/4/130489128/1589291.pdf
    • http://medder.store/uploads/1/3/0/3/130324158/3599668.pdf
    • http://quantum-advisors.com/uploads/1/3/0/3/130379067/wowunu.pdf
    • http://www.mbaoc.net/uploads/1/3/0/2/130273814/dibepirorafiniroveno.pdf
    • http://jetgogroundservices.com/uploads/1/3/0/3/130323148/lefededi.pdf
    • http://dreamlandstudios.org/uploads/1/3/0/6/130639729/nuwakonaz_logorowigedukef.pdf
    • http://akochdesign.com/uploads/1/3/0/2/130271171/9032113.pdf
    • http://g9minerals.com/uploads/1/3/0/3/130379864/2700317.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_off0000613d.bin
700d837ab6f101ec26f976be7bef745530e1bc05e050ded4ad0f0abf698815c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 7344 bytes

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